The 2nd district consists of the northern half of Philadelphia. It mostly overlaps with the old 1st District. That district's incumbent, Democrat Bob Brady, has served since 1998, but is not running for reelection. The incumbent of the old 2nd district is Dwight Evans, but Evans opted to follow most of his constituents into the 3rd District.
The new map drew the home of fellow Democrat Brendan Boyle, who has represented the neighboring 13th District since 2015, into the 2nd, leading to speculation that he would run for reelection there. Soon after the new map was released, Boyle confirmed that he would indeed run in the 2nd.
The 3rd district was previously located in Northwestern Pennsylvania, but now covers downtown and northern Philadelphia, and overlaps with much of the previous 2nd district. The incumbent from the 2nd district is Democrat Dwight Evans, who has held office since 2016. Evans defeated incumbent Democratic Representative Chaka Fattah in the 2016 Democratic primary, and then went on to be elected with 90% in both the general election and a simultaneous special election for the remainder of the term after Fattah resigned.
The old 4th district was in South Central Pennsylvania, but the new 4th district is centered in Montgomery County. The district overlaps with the former 13th district. The incumbent from this district, Democrat Brendan Boyle, could have sought re-election in either this district or the new 2nd district, which absorbed his home and most of old 13th's share of Philadelphia. Boyle opted to run in the 2nd, making the 4th an open seat.
State Senator Daylin Leach had announced that he would run for Congress in the old 7th District, but was expected to switch races after his home was drawn into the new 4th. However, on February 24, 2018, Leach succumbed to pressures from fellow Democrats, including Governor Tom Wolf, to abandon his congressional campaign in the face of accusations of sexual harassment. However, he will remain in his Pennsylvania Senate seat.
The old 5th district was in North Central Pennsylvania, but the new 5th district consists of Delaware County and portions of South Philadelphia. The district overlaps with much of the old 7th district, whose incumbent Republican Congressman Pat Meehan chose not to seek re-election, due to allegations regarding a sexual harassment complaint that was settled with the use of taxpayer funds, and subsequently resigned from office in April.
The 6th district consists of Chester County and Reading. The incumbent is Republican Ryan Costello, who has represented the district since 2015. He was re-elected to a second term with 57% of the vote in 2016. On March 24, 2018, Costello announced that he will no longer seek re-election due to the growing Democratic voter demographic in the 6th district. Costello formally withdrew his name on March 27.
The 7th district was formerly centered on Delaware County, but the new district consists of much of the Lehigh Valley. The new 7th district overlaps with much of the former 15th district, which was represented by retired Republican Congressman Charlie Dent who resigned early.
The 8th district was previously centered on Bucks County, but now consists of portions of Northeast Pennsylvania, including the city of Scranton. The new district overlaps with much of the former 17th district, which is represented by Democratic Congressman Matt Cartwright. Cartwright has held office since 2013.
The old 9th district was in South Central Pennsylvania, but the new 9th district is in east central Pennsylvania. The new district overlaps with the old 11th district, which is represented by retiring Republican Congressman Lou Barletta.
The 10th district was previously in Northeastern Pennsylvania, but it now overlaps with much of the former 4th district in South Central Pennsylvania. Under the map released in 2018, the 10th district includes Harrisburg and a portion of York County. The incumbent from the 4th district is Republican Scott Perry, who has represented his district since 2013. He was re-elected to a third term with 66% of the vote in 2016. Several Democrats sought to challenge Perry in 2018, with George Scott, a 20-year Army veteran and Lutheran pastor, receiving the party's nomination.
Meteorologist Drew Anderson was planning on running without party affiliation and expected to be listed that way on the November ballot. However, he failed to file papers in time, and is now out of the race.
The old 14th district consisted of the city of Pittsburgh and parts of surrounding suburbs, but the new district consists of suburbs to the south and west of Pittsburgh. The district overlaps with much of the former 18th district. The winner of the 2018 special election, Democrat Conor Lamb, is running in the more competitive 17th district.
The former 16th district was in Southeastern Pennsylvania, but the redrawn 16th district will be in Northwestern Pennsylvania, overlapping with the former 3rd district. The incumbent from the 3rd district is Republican Mike Kelly, who has represented the district since 2011. He was re-elected to a fourth term unopposed in 2016. Kelly had considered running for the U.S. Senate, but announced he will run for re-election instead.
The former 17th district was in Northeastern Pennsylvania, but the new 17th district consists of suburbs west of Pittsburgh. The district overlaps with parts of the former 12th district, which is represented by Republican Keith Rothfus. Rothfus has held office since 2013, and plans to run for reelection in the new 17th.
The new map drew the home of Democrat Conor Lamb, who won a special election for the old 18th District, into the new 17th. The 17th is far less Republican than its predecessor, and voted for Democrats downballot, leading to speculation that Lamb would run for a full term in the 17th regardless of the special election result. On March 14, Democratic officials in Beaver County, which is entirely within the 17th, received a written request from Lamb for their endorsement in the 2018 general election. On March 20, Lamb formally filed to run for a full term in the 17th.
The 18th district formerly consisted of the southern suburbs of Pittsburgh, but the new district is now centered on Pittsburgh itself. The district overlaps with the former 14th district, which is represented by Democrat Michael F. Doyle. Doyle has held office since 1995. He is running unopposed in the general election.
United States House of Representatives District 18