Timothy Francis Murphy is an American former politician and psychologist who served as the U.S. representative for Pennsylvania's 18th congressional district from 2003 until his resignation in 2017. The district included several suburbs south of Pittsburgh. A member of the Republican Party, he also represented the 37th Senate district in the Pennsylvania State Senate from 1996 to 2003. Murphy consistently carried the 18th district with at least 58% of the vote, including unopposed re-election bids in 2014 and 2016.

Conor James Lamb is an American attorney and politician who served as the U.S. representative for Pennsylvania's 17th congressional district from 2018 to 2023. A member of the Democratic Party, he previously represented the neighboring 18th district in 2018. Lamb was also an unsuccessful candidate in the 2022 United States Senate election in Pennsylvania.