PA-01 elected a Republican in 2018.

R+2.5 on 329,798 certified votes. Below: the 2018 result and this district's margin across every cycle on record.

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PA-01 — 2018 result

Source: MIT Election Data + Science Lab, US House returns (party-classified by literal ballot party).

Democratic (D)

160,745

48.7%

Republican (R)

169,053

51.3%

All others

0

0.0%

Margin

R+2.5

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Margin history

PA-01 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	R	−12.8%	463,432
2022	R	−9.7%	367,380
2020	R	−13.1%	441,679
2018	R	−2.5%	329,798
2016	D	+64.4%	299,010
2014	D	+65.7%	158,441
2012	D	+69.9%	277,102
2010	D	+100.0%	149,944
2008	D	+81.5%	267,513
2006	D	+100.0%	137,999
2004	D	+72.9%	248,585
2002	D	+74.0%	140,090
2000	D	+76.5%	169,541
1998	D	+64.6%	95,848
1996	D	+75.0%	165,945
1994	D	+63.0%	122,264
1992	D	+61.8%	185,591
1990	D	+58.9%	92,441
1988	D	+52.6%	167,825
1986	D	+49.5%	118,035
1984	D	+49.9%	197,682
1982	D	+45.7%	143,416
1980	D	+47.5%	155,451
1978	D	+45.8%	145,162
1976	D	+48.3%	159,205