Pennsylvania Political Realignment Map (2000-2024)

Select a County

Click on any county to see detailed election results and analysis.

Search County:

🏛️ Pennsylvania Statewide

Select a contest to see statewide results and margin.

🔍 Research Findings: Pennsylvania Electoral Transformation (2000-2024)

1️⃣ The Great Realignment: Pennsylvania's Battleground Status

The Reality: Pennsylvania remains America's most critical swing state, deciding the presidency in 2020 and continuing to serve as the ultimate bellwether. Analysis of statewide elections (2000-2024) across 67 counties reveals how the state shifted from a Democratic-leaning battleground to a true toss-up driven by dramatic geographic polarization.

Presidential Results - The Narrowing Margins: 2000: D+4.20% → 2004: D+2.50% → 2008: D+10.30% → 2012: D+5.40% → 2016: R+0.70% → 2020: D+1.20% → 2024: R+1.80%

Year-by-Year Analysis:

2000: Gore 50.60%, Bush 46.40% — Democrats carry PA in close national race
2004: Kerry 50.90%, Bush 48.40% — Pennsylvania votes more Democratic than nation
2008: Obama 54.50%, McCain 44.20% — Dominant Democratic coalition victory
2012: Obama 52.00%, Romney 46.60% — Comfortable but narrowing Democratic win
2016: Trump 48.20%, Clinton 47.50% — SHOCK: First GOP presidential win since 1988
2020: Biden 50.00%, Trump 48.80% — Democrats narrowly reclaim by 80,000 votes
2024: Trump 50.50%, Harris 48.70% — Republicans retake PA, securing Electoral College

The Math of the Shift: From Obama's D+10.30% in 2008 to outcomes within 2 points represents profound change. Pennsylvania went from voting 3-4 points more Democratic than the nation (2000-2012) to nearly matching national results — making it THE decisive swing state where presidential elections are won and lost.

Statewide Races - The Casey Dynasty and Democratic Senate Strength:

2006 U.S. Senate: Bob Casey Jr. (D) defeats Rick Santorum (R) 59.00% to 41.00% — Crushing Democratic landslide
2010 Governor: Tom Corbett (R) defeats Dan Onorato (D) 54.50% to 45.50% — Tea Party wave, only one term
2012 U.S. Senate: Bob Casey Jr. (D) defeats Tom Smith (R) 53.70% to 44.60% — Democrats hold easily
2014 Governor: Tom Wolf (D) defeats Tom Corbett (R) 54.90% to 40.40% — Democratic comeback
2016 U.S. Senate: Pat Toomey (R) narrowly defeats Katie McGinty (D) 48.80% to 47.20% — Toomey runs ahead of Trump
2018 U.S. Senate: Bob Casey Jr. (D) defeats Lou Barletta (R) 55.60% to 42.80% — Democrats surge in midterms
2018 Governor: Tom Wolf (D) defeats Scott Wagner (R) 57.80% to 40.70% — Democrats dominate lower-ballot races
2022 Governor: Josh Shapiro (D) defeats Doug Mastriano (R) 56.50% to 41.80% — Massive Democratic landslide
2022 U.S. Senate: John Fetterman (D) defeats Dr. Mehmet Oz (R) 51.20% to 46.30% — Democrats hold critical open seat

The Pennsylvania Paradox: Pennsylvania Democrats consistently win Senate and gubernatorial races by substantial margins (Casey, Wolf, Shapiro, Fetterman), yet the state remains razor-close at the presidential level. This reflects Pennsylvania's unique two-state geography and the power of localized, working-class Democratic messaging.

The Democratic Urban Firewall — Philadelphia and Pittsburgh:

Philadelphia County: Population 1.6M — Delivers 400,000+ Democratic vote margins, the single most important county for Democrats
Philadelphia Suburbs: Montgomery, Delaware, Chester, Bucks Counties — Once Republican strongholds, now Democratic-leaning and critical to statewide wins
Allegheny County (Pittsburgh): Population 1.2M — Consistent 100,000+ Democratic margins anchor Western PA
Other Urban Counties: Dauphin (Harrisburg), Centre (State College), Lehigh (Allentown), Northampton (Bethlehem) provide smaller but important Democratic margins

These southeastern PA counties alone can provide 500,000+ vote Democratic margins — but Republicans counter with overwhelming margins across rural Pennsylvania's "T" region.

The Rural and Working-Class Shift - Republican Gains (2008-2024): Pennsylvania's rural transformation explains why the state became so competitive:

Erie County: Northwest PA industrial county that swung from Obama to Trump
Luzerne County (Scranton/Wilkes-Barre): Biden's "hometown" county that gave Obama big wins but went narrowly for Trump in 2016 and 2020
Northampton County (Lehigh Valley): Classic bellwether that perfectly mirrors state presidential results
Washington County (Southwest PA): Traditional coal/steel union territory that shifted dramatically Republican
Beaver, Fayette, Greene Counties: Southwest PA counties with coal/fracking economies showing massive Republican gains
Cambria County (Johnstown): Historic steel city region that moved heavily Republican

Geographic Scope - "Two Pennsylvanias": The transformation reveals Pennsylvania's deep geographic divide:

The "T" - Central and Northern PA: The vast rural interior from the Northern Tier through central PA to the southwest, dominated by white working-class voters, delivers massive Republican margins
Appalachian Pennsylvania: Southwest PA coal country and northeast PA anthracite regions shifted dramatically Republican despite historical union Democratic tradition
Small Manufacturing Cities: Erie, Scranton, Wilkes-Barre, Altoona, Johnstown - once reliably Democratic, now competitive or Republican-leaning
Philadelphia Suburban Collar: Montgomery, Delaware, Chester, Bucks counties flipped from Republican to Democratic, offsetting rural losses and keeping PA competitive

Key Inflection Points:

1992-2004: Pennsylvania as reliable Democratic-leaning state - Clinton and Gore won it, Kerry narrowly held it despite Bush's national victory
2008-2012: Obama carried Pennsylvania comfortably both times, performing especially well in Philadelphia suburbs while maintaining industrial Pennsylvania
2010: Tea Party wave elected Tom Corbett (R) as governor, signaling rural Pennsylvania's rightward shift
2016: Trump's shocking breakthrough — Won Pennsylvania by R+0.70% (44,000 votes), flipping the state for first time since 1988. Rural Pennsylvania and Rust Belt counties surged Republican.
2018: Democrats swept statewide races (Casey Senate, Wolf Governor) and flipped suburban House seats, demonstrating suburban realignment
2020: Biden narrowly reclaimed Pennsylvania by 1.2% (80,000 votes) — Philadelphia suburbs delivered victory despite rural losses
2022: Democrats dominated (Fetterman Senate 51%, Shapiro Governor 57%) showing strength in non-presidential years
2024: Trump recaptures Pennsylvania by ~2% - securing Electoral College victory as PA remains the decisive swing state

The Coalition Transformation:

Pennsylvania's Democratic coalition has fundamentally shifted. The party once relied on a powerful alliance between Philadelphia's Black voters, industrial union workers in steel/coal towns, and white working-class communities across WesternPA. By 2016, this coalition had evolved. Democrats now depend on massive margins from Philadelphia (400,000+ votes), growing support from college-educated suburban voters (especially women) in the Philadelphia collar counties, and Pittsburgh's Allegheny County. Meanwhile, rural and working-class white Pennsylvania—once a Democratic stronghold in the New Deal era—now votes overwhelmingly Republican. The state's competitiveness depends on whether Democrats' suburban gains can offset rural losses.

Congressional Dynamics:

Democratic House Gains (2018-2022): Democrats flipped suburban House seats in the Philadelphia collar counties (PA-05, PA-06, PA-07, PA-17) as college-educated suburban voters shifted Democratic
Competitive Districts: Pennsylvania's House delegation reflects the state's razor-thin presidential margins with districts heavily dependent on presidential coattails

Post-2016 Republican Consolidation:

Congressional Battleground:

Pennsylvania's House delegation is highly competitive - typically split near evenly between parties after redistricting
2018 "blue wave" saw Democrats flip suburban seats (PA-05, PA-06, PA-07, PA-17) as Philadelphia suburbs realigned
2022 redistricting created new competitive districts, maintaining Pennsylvania's role as congressional battleground
Key members: Chrissy Houlahan (PA-06), Susan Wild (PA-07), Matt Cartwright (PA-08) represent Democrats' suburban/working-class coalition

Historical Significance: Pennsylvania's evolution from Democratic-leaning (1992-2012) to true toss-up swing state (2016-2024) makes it America's most consequential battleground. The state that Hillary Clinton assumed she would win in 2016 became the decisive Electoral College prize that determined both the 2020 and 2024 presidential outcomes.

Socioeconomic Drivers:

Educational Polarization: College-educated suburban voters (especially women) moved sharply Democratic while non-college rural voters moved Republican
Manufacturing Decline: Loss of steel, coal, and manufacturing jobs in western and northeastern PA eroded traditional Democratic union base
Cultural Issues: Gun rights (hunting culture strong in rural PA), abortion, and values increasingly drive voting patterns
Trade Policy: Rust Belt communities blamed NAFTA and trade deals for job losses, benefiting Trump's economic populism
Opioid Crisis: Rural Pennsylvania devastated by addiction, creating economic despair and anti-establishment sentiment
Energy Politics: Fracking boom in southwest PA and coal's decline in Appalachian PA created regional political realignment
Demographic Change: Philadelphia suburbs diversifying and attracting college-educated transplants, shifting these counties Democratic

Electoral Impact: Pennsylvania operates as true two-state system: Democrats must generate massive margins from Philadelphia/suburbs and Pittsburgh while limiting losses in rural Pennsylvania. The party that best navigates this divide wins Pennsylvania — and often the presidency.

2️⃣ Lackawanna County: Biden's Hometown Becomes a Swing County

Historical Context: Lackawanna County (Scranton), Joe Biden's childhood hometown in northeastern Pennsylvania, represents the ultimate working-class realignment story. From the 1930s through the 2000s, this anthracite coal and manufacturing region was reliably Democratic, rooted in union strength and ethnic Catholic Democratic traditions. Biden's formative years in Scranton shaped his working-class political identity.

Lackawanna County Presidential Results - The Dramatic Shift: 2008: D+26.20% → 2012: D+27.60% → 2016: D+3.59% → 2020: D+8.45% → 2024: D+2.81%

Year-by-Year Analysis:

2008: D+26.20% — Stronghold Democratic (Obama 63.08%, McCain 36.92%)
2012: D+27.60% — Stronghold Democratic (Obama 63.79%, Romney 36.21%)
2016: D+3.59% — NARROWED: But Stayed Democratic (Clinton 51.79%, Trump 48.21%)
2020: D+8.45% — Democratic Recovery (Biden 54.23%, Trump 45.77%)
2024: D+2.81% — Lean Democratic (Harris 51.40%, Trump 48.60%)

The Realignment Story: Lackawanna County's transformation from D+26.20% (2008) to D+3.59% (2016), then D+8.45% (2020) and D+2.81% (2024) reflects the county's volatility as a working-class swing area. While Biden recovered the county in 2020, the narrow margins weren't sufficient to save U.S. Representative Matt Cartwright in PA-8, who lost to Republican Rob Bresnahan despite the county's Democratic lean. This demonstrates that local congressional races can turn on factors beyond statewide trends.

Why Lackawanna Matters for Pennsylvania: As Biden's home county, Lackawanna's narrow Democratic recovery in 2024 shows the fragility of Democratic support in Appalachian Pennsylvania. While Philadelphia and its suburbs have become Democratic strongholds, counties like Lackawanna demonstrate the limits to Democratic reach in post-industrial working-class regions, even when the county itself stays blue.

3️⃣ Philadelphia County - The Democratic Firewall

Pennsylvania's Most Valuable Political Real Estate: Philadelphia County (population 1.6M) is the single most important county in Pennsylvania politics. No Democrat can win statewide without overwhelming margins here, and no Republican can win the state without making significant gains against Democrats in Philly.

Presidential Results - The Democratic Foundation (2008-2024): 2008: D+33.00% → 2012: D+32.00% → 2016: D+35.00% → 2020: D+38.00% → 2024: D+40.00%

Year-by-Year Analysis:

2008: Obama 70.00%, McCain 37.00%
2012: Obama 70.00%, Romney 38.00%
2016: Clinton 75.00%, Trump 40.00%
2020: Biden 77.00%, Trump 39.00%
2024: Harris 79.00%, Trump 39.00%

Vote Production - Why Philly Decides Statewide Races: Philadelphia delivers approximately 400,000+ Democratic vote margins in presidential elections. This 400,000-vote Democratic lead is ESSENTIAL for statewide Democratic victory. Essentially, Democrats must win the statewide race by at least 400,000 votes or lose Pennsylvania - that's what Philadelphia provides.

Internal Geography:

Center City: West Philadelphia, Kensington, majority-Black neighborhoods deliver 80-85% Democratic votes
Northeast Philadelphia: Historically Italian/Polish neighborhoods shifting from swing to Democratic-leaning
University District: Penn, Drexel, Temple areas combined with young professionals provide stable Democratic margins

4️⃣ Philadelphia Suburban Counties - The Battleground

The Realignment That Threatens Republicans Statewide: Montgomery, Delaware, Chester, and Bucks counties—the suburban Philadelphia collar—represent the transformation that keeps Pennsylvania competitive. These five counties that were once Republican strongholds have shifted Democratic, offsetting rural Pennsylvania's Republican gains.

The Suburban Realignment:

2008: Obama won Philadelphia suburbs narrowly
2016: Clinton flipped multiple suburban House seats, signaling Republican vulnerability
2020: Biden won Philadelphia suburbs decisively, providing margins that offset rural losses
2024: Harris maintained strong suburban margins despite rural losses elsewhere

Why This Matters: Republican strategy in Pennsylvania must focus on limiting losses in Philadelphia suburbs, not winning them. If Democrats maintain 15+ point margins in the Philly suburbs while also winning Philadelphia itself, Republican candidates must run up statewide margins of 8+ points in rural and central Pennsylvania to compensate.

5️⃣ Allegheny County (Pittsburgh) - Western PA's Democratic Anchor

Pennsylvania's Second Democratic Firewall: Allegheny County (Pittsburgh metro, population 1.2M) provides Democrats' second-largest vote source after Philadelphia. Pittsburgh's transformation from Republican steel city to Democratic metro represents one of the nation's most significant urban realignments.

Vote Production: Allegheny County consistently delivers 100,000-150,000 Democratic vote margins, substantially less than Philadelphia but crucial to statewide Democratic victories. Combined with Philly's 400,000+ margin, Pennsylvania Democrats have built a potential firewall of 500,000-550,000 votes that Republican rural dominance must overcome.

6️⃣ Southwest PA Rural Counties - Republican Surge

The Appalachian Pittsburgh Hinterland: Counties like Beaver, Greene, Fayette, Washington, and Cambria—southwestern Pennsylvania's coal and fracking country—have shifted heavily Republican. These regions present Democrats' greatest challenge: former union strongholds now voting 60%+ Republican.

The Economic Transformation: Coal industry decline, fracking boom with environmental concerns, and union power collapse have combined to move these regions decisively Republican. Biden's 2020 pledge to end coal jobs accelerated Republican gains among remaining miners and their families.

7️⃣ Pennsylvania's Competitive Future

The State That Can't Be Taken For Granted: Pennsylvania's 2024 result (Trump 50.5%, Harris 48.7%, a 1.8-point Republican victory) shows the state remains America's most consequential swing state. With 19 electoral votes, Pennsylvania determines the presidency more than any other single state.

The Math of Pennsylvania Politics:

Democratic Urban/Suburban Firewall: Philadelphia (400,000 margin) + Allegheny (125,000 margin) + Philadelphia suburbs (100,000 margin) + other smaller cities = ~650,000 Democratic vote advantage
Republican Rural/Exurban Advantage: The 57 other counties combined produce 700,000+ Republican vote margin
Result: Republicans start with ~50,000 vote statewide advantage before a single vote is cast
Battlegrounds: Lean Democratic counties (Dauphin, Centre, Lehigh, Northampton, Erie) determine every race

Why Pennsylvania Remains Competitive Unlike Ohio: Unlike Ohio, Pennsylvania has metropolitan areas growing or stable (Philadelphia suburbs, Pittsburgh tech corridor), college-educated population increases, and reliable urban Democratic margins. These demographic trends keep Pennsylvania the true swing state.

📊 Top 15 Counties by Electoral Swing (2000-2024)

The Most Dramatic Transformations: These counties experienced the greatest partisan shifts over the past two decades, revealing the underlying dynamics of Pennsylvania's realignment.

Greene County: 2000: D+10.21% → 2024: R+45.69%
Total Swing: 55.90% toward Republicans. Flipped from Democratic to Republican.

Fayette County: 2000: D+16.90% → 2024: R+38.12%
Total Swing: 55.02% toward Republicans. Flipped from Democratic to Republican.

Cambria County: 2000: D+3.96% → 2024: R+40.00%
Total Swing: 43.96% toward Republicans. Flipped from Democratic to Republican.

Lawrence County: 2000: D+6.55% → 2024: R+34.00%
Total Swing: 40.55% toward Republicans. Flipped from Democratic to Republican.

Carbon County: 2000: D+4.67% → 2024: R+35.08%
Total Swing: 39.75% toward Republicans. Flipped from Democratic to Republican.

Armstrong County: 2000: R+16.45% → 2024: R+53.58%
Total Swing: 37.13% toward Republicans.

Clinton County: 2000: R+4.69% → 2024: R+41.23%
Total Swing: 36.54% toward Republicans.

Schuylkill County: 2000: R+6.47% → 2024: R+42.43%
Total Swing: 35.96% toward Republicans.

Elk County: 2000: R+12.16% → 2024: R+47.34%
Total Swing: 35.18% toward Republicans.

Washington County: 2000: D+9.26% → 2024: R+25.67%
Total Swing: 34.93% toward Republicans. Flipped from Democratic to Republican.

Somerset County: 2000: R+25.40% → 2024: R+57.64%
Total Swing: 32.24% toward Republicans.

Mercer County: 2000: D+1.46% → 2024: R+30.42%
Total Swing: 31.88% toward Republicans. Flipped from Democratic to Republican.

Clearfield County: 2000: R+21.19% → 2024: R+51.92%
Total Swing: 30.73% toward Republicans.

Beaver County: 2000: D+9.01% → 2024: R+20.89%
Total Swing: 29.90% toward Republicans. Flipped from Democratic to Republican.

Warren County: 2000: R+10.42% → 2024: R+39.56%
Total Swing: 29.14% toward Republicans.

🔀 Counties That Changed Parties (2000-2024)

Party Conversions: 15 counties flipped from one party to another between 2000 and 2024, demonstrating Pennsylvania's electoral volatility.

Counties Flipped Democratic → Republican (9 counties):

Greene County: 2000: D+10.21% → 2024: R+45.69% (55.90% swing)

Fayette County: 2000: D+16.90% → 2024: R+38.12% (55.02% swing)

Cambria County: 2000: D+3.96% → 2024: R+40.00% (43.96% swing)

Lawrence County: 2000: D+6.55% → 2024: R+34.00% (40.55% swing)

Carbon County: 2000: D+4.67% → 2024: R+35.08% (39.75% swing)

Washington County: 2000: D+9.26% → 2024: R+25.67% (34.93% swing)

Mercer County: 2000: D+1.46% → 2024: R+30.42% (31.88% swing)

Beaver County: 2000: D+9.01% → 2024: R+20.89% (29.90% swing)

Luzerne County: 2000: D+8.62% → 2024: R+19.32% (27.94% swing)

Counties Flipped Republican → Democratic (3 counties):

Chester County: 2000: R+9.90% → 2024: D+14.61% (24.51% swing)

Dauphin County: 2000: R+9.43% → 2024: D+5.99% (15.42% swing)

Centre County: 2000: R+10.01% → 2024: D+2.86% (12.87% swing)

Narrow Flips Democratic → Republican (3 counties):

Erie County: 2000: D+9.57% → 2024: R+1.03% (10.60% swing)

Northampton County: 2000: D+5.67% → 2024: R+1.79% (10.84% swing - corrected from 7.46%)

Bucks County: 2000: D+4.31% → 2024: R+0.07% (5.42% swing - corrected from 4.38%)

🏭 The Working-Class Realignment: Coal, Steel, and Manufacturing Counties (2000-2024)

The Core of Pennsylvania's Transformation: 17 working-class counties in Pennsylvania's coal, steel, and manufacturing regions experienced dramatic partisan shifts that reshaped the state's electoral landscape.

📊 Key Statistics:

Average Republican Swing: 34.10 percentage points (2000-2024)
Counties Flipped to Republican: 10 out of 17 working-class counties
Regions Affected: Southwest PA (coal/steel), Northeast PA (anthracite), Northwest PA (manufacturing)

📅 Working-Class Counties By Election Cycle:

🔵 2000: 11 Democratic, 6 Republican | D+1.10% average

🔴 2004: 6 Democratic, 11 Republican | R+4.64% average

🔴 2008: 5 Democratic, 12 Republican | R+3.07% average

🔴 2012: 3 Democratic, 14 Republican | R+12.01% average

🔴 2016: 1 Democratic, 16 Republican | R+31.73% average

🔴 2020: 2 Democratic, 15 Republican | R+30.42% average

🔴 2024: 1 Democratic, 16 Republican | R+33.00% average

🔴 Biggest Republican Swings in Working-Class Counties:

Greene County (SW PA Coal): 55.90% shift toward Republicans
Fayette County (SW PA Coal/Steel): 55.02% shift toward Republicans
Cambria County (SW PA Coal/Steel (Johnstown)): 43.96% shift toward Republicans
Lawrence County (SW PA Manufacturing): 40.55% shift toward Republicans
Carbon County (NE PA Anthracite): 39.75% shift toward Republicans
Armstrong County (SW PA Manufacturing): 37.13% shift toward Republicans
Schuylkill County (NE PA Anthracite): 35.96% shift toward Republicans
Washington County (SW PA Coal/Steel): 34.93% shift toward Republicans
Somerset County (SW PA Coal): 32.24% shift toward Republicans
Mercer County (NW PA Manufacturing): 31.88% shift toward Republicans

📋 Detailed County-by-County Breakdown (All Election Cycles):

Armstrong County (SW PA Manufacturing): 2000: R+16.45% → 2004: R+22.29% → 2008: R+24.95% → 2012: R+38.02% → 2016: R+53.18% → 2020: R+52.95% → 2024: R+53.58%
Total Swing: 37.13% toward Republicans (2000-2024)

Beaver County (SW PA Steel): 2000: D+9.01% → 2004: D+2.72% → 2008: R+2.87% → 2012: R+6.66% → 2016: R+19.38% → 2020: R+17.91% → 2024: R+20.89%
Total Swing: 29.90% toward Republicans (2000-2024). Flipped from DEM to REP.

Cambria County (SW PA Coal/Steel (Johnstown)): 2000: D+3.96% → 2004: R+2.19% → 2008: D+0.71% → 2012: R+18.37% → 2016: R+38.27% → 2020: R+37.75% → 2024: R+40.00%
Total Swing: 43.96% toward Republicans (2000-2024). Flipped from DEM to REP.

Carbon County (NE PA Anthracite): 2000: D+4.67% → 2004: R+1.20% → 2008: D+1.92% → 2012: R+7.67% → 2016: R+35.43% → 2020: R+32.45% → 2024: R+35.08%
Total Swing: 39.75% toward Republicans (2000-2024). Flipped from DEM to REP.

Clearfield County (Central PA Coal): 2000: R+21.19% → 2004: R+20.60% → 2008: R+12.36% → 2012: R+29.32% → 2016: R+50.50% → 2020: R+50.24% → 2024: R+51.92%
Total Swing: 30.73% toward Republicans (2000-2024)

Erie County (NW PA Manufacturing): 2000: D+9.57% → 2004: D+8.42% → 2008: D+20.16% → 2012: D+16.24% → 2016: R+1.66% → 2020: D+1.05% → 2024: R+1.03%
Total Swing: 10.60% toward Republicans (2000-2024). Flipped from DEM to REP.

Fayette County (SW PA Coal/Steel): 2000: D+16.90% → 2004: D+7.52% → 2008: R+0.41% → 2012: R+8.43% → 2016: R+31.68% → 2020: R+33.70% → 2024: R+38.12%
Total Swing: 55.02% toward Republicans (2000-2024). Flipped from DEM to REP.

Greene County (SW PA Coal): 2000: D+10.21% → 2004: R+0.72% → 2008: R+0.38% → 2012: R+18.04% → 2016: R+41.53% → 2020: R+43.84% → 2024: R+45.69%
Total Swing: 55.90% toward Republicans (2000-2024). Flipped from DEM to REP.

Indiana County (SW PA Coal/Manufacturing): 2000: R+10.28% → 2004: R+12.26% → 2008: R+7.24% → 2012: R+18.99% → 2016: R+36.69% → 2020: R+37.95% → 2024: R+39.41%
Total Swing: 29.13% toward Republicans (2000-2024)

Lackawanna County (NE PA Anthracite (Biden's hometown)): 2000: D+24.17% → 2004: D+14.19% → 2008: D+26.20% → 2012: D+27.60% → 2016: D+3.59% → 2020: D+8.45% → 2024: D+2.81%
Total Swing: 21.36% toward Republicans (2000-2024)

Lawrence County (SW PA Manufacturing): 2000: D+6.55% → 2004: R+1.27% → 2008: R+5.15% → 2012: R+9.16% → 2016: R+28.96% → 2020: R+29.88% → 2024: R+34.00%
Total Swing: 40.55% toward Republicans (2000-2024). Flipped from DEM to REP.

Luzerne County (NE PA Anthracite (Scranton/Wilkes-Barre)): 2000: D+8.62% → 2004: D+3.43% → 2008: D+8.51% → 2012: D+4.88% → 2016: R+20.01% → 2020: R+14.53% → 2024: R+19.32%
Total Swing: 27.94% toward Republicans (2000-2024). Flipped from DEM to REP.

Mercer County (NW PA Manufacturing): 2000: D+1.46% → 2004: R+2.89% → 2008: R+0.29% → 2012: R+3.38% → 2016: R+25.48% → 2020: R+26.35% → 2024: R+30.42%
Total Swing: 31.88% toward Republicans (2000-2024). Flipped from DEM to REP.

Schuylkill County (NE PA Anthracite): 2000: R+6.47% → 2004: R+9.88% → 2008: R+8.81% → 2012: R+13.61% → 2016: R+44.81% → 2020: R+40.44% → 2024: R+42.43%
Total Swing: 35.96% toward Republicans (2000-2024)

Somerset County (SW PA Coal): 2000: R+25.40% → 2004: R+29.91% → 2008: R+25.48% → 2012: R+43.53% → 2016: R+57.55% → 2020: R+56.86% → 2024: R+57.64%
Total Swing: 32.24% toward Republicans (2000-2024)

Washington County (SW PA Coal/Steel): 2000: D+9.26% → 2004: D+0.58% → 2008: R+4.78% → 2012: R+13.77% → 2016: R+25.65% → 2020: R+23.04% → 2024: R+25.67%
Total Swing: 34.93% toward Republicans (2000-2024). Flipped from DEM to REP.

Westmoreland County (SW PA Steel/Manufacturing): 2000: R+5.94% → 2004: R+12.55% → 2008: R+16.90% → 2012: R+23.98% → 2016: R+32.27% → 2020: R+28.71% → 2024: R+28.63%
Total Swing: 22.69% toward Republicans (2000-2024)

🏛️ 2024 Senate Race: Dave McCormick Defeats Bob Casey Jr.

The End of an Era: In 2024, Republican Dave McCormick narrowly defeated three-term Democratic Senator Bob Casey Jr., marking a stunning upset in Pennsylvania politics.

Why This Matters:

Casey Dynasty Ends: Bob Casey Jr. had served since 2007, winning three consecutive terms with comfortable margins (2006: D+17%, 2012: D+9%, 2018: D+13%)
Working-Class Appeal Lost: Casey, from Scranton area, was known as a working-class Democrat who could win in rural Pennsylvania
Trump Coattails: McCormick's victory mirrored Trump's ~2% win, showing Republican dominance extended down-ballot
Realignment Confirmed: Even moderate, pro-union Democrats like Casey struggled in the new Pennsylvania electoral landscape

🚨 The 2024 Collapse - Counties That Abandoned Casey:

Several counties that barely held for Casey in his 2018 re-election flipped hard Republican in 2024, revealing the sudden collapse of his working-class coalition:

Beaver County (SW PA Steel): 2006: D+24.12% → 2012: D+2.35% → 2018: D+3.73% → 2024: R+15.90%
Coalition Collapse: 19.63 percentage points (2018→2024). Went from Casey's Democratic stronghold to McCormick victory.

Berks County (Reading Area): 2006: D+9.52% → 2012: D+3.45% → 2018: D+3.84% → 2024: R+9.33%
Coalition Collapse: 13.17 percentage points (2018→2024). Barely held for Casey, then broke hard Republican.

Northampton County (Lehigh Valley): 2006: D+16.58% → 2012: D+9.45% → 2018: D+10.37% → 2024: R+0.59%
Coalition Collapse: 10.96 percentage points (2018→2024). Bellwether county that tracked statewide winner - barely flipped to McCormick.

This final collapse shows the realignment was not just gradual erosion, but a sudden break in 2024 when even Casey's strong working-class brand couldn't save him.

The New Reality: Pennsylvania's working-class realignment wasn't just about presidential politics. The defeat of Bob Casey—a senator with deep Pennsylvania roots and working-class appeal—demonstrated that the Republican gains in coal, steel, and manufacturing regions represent a fundamental party realignment, not just candidate-specific preferences.

📊 County Analysis

Select a County

🏛️ Pennsylvania Statewide

🔍 Research Findings: Pennsylvania Electoral Transformation (2000-2024)

1️⃣ The Great Realignment: Pennsylvania's Battleground Status

2️⃣ Lackawanna County: Biden's Hometown Becomes a Swing County

3️⃣ Philadelphia County - The Democratic Firewall

4️⃣ Philadelphia Suburban Counties - The Battleground

5️⃣ Allegheny County (Pittsburgh) - Western PA's Democratic Anchor

6️⃣ Southwest PA Rural Counties - Republican Surge

7️⃣ Pennsylvania's Competitive Future

📊 Top 15 Counties by Electoral Swing (2000-2024)

🔀 Counties That Changed Parties (2000-2024)

🏭 The Working-Class Realignment: Coal, Steel, and Manufacturing Counties (2000-2024)

🏛️ 2024 Senate Race: Dave McCormick Defeats Bob Casey Jr.

🗳️ Pennsylvania Election Contests

Political Categories