Peter James Roskam is an American politician and lobbyist who is the former U.S. representative for Illinois's 6th congressional district, serving six terms from 2007 to 2019. He is a member of the Republican Party and served as the chief deputy majority whip from 2011 to 2014, ranking fourth among House Republican leaders. Previously, he served in the Illinois Senate and the Illinois House of Representatives. He served as chairman of the House Ways and Means Subcommittee on Tax Policy for the 115th Congress. Roskam was defeated by Democrat Sean Casten in the 2018 election. In 2023, he was named federal policy head of the lobbying practice at Washington, DC-based law firm BakerHostetler.

Ladda Tammy Duckworth is an American politician and retired Army National Guard lieutenant colonel serving as the junior United States senator from Illinois since 2017. A member of the Democratic Party, she represented Illinois's 8th congressional district in the United States House of Representatives from 2013 to 2017.