Sean Thomas Casten is an American businessman and politician serving as the U.S. representative for Illinois's 6th congressional district. The district covers southwestern Chicago, as well as many of Chicago's inner southwestern suburbs, such as Downers Grove, Wheaton, Lisle, Orland Park, and Western Springs. He is a member of the Democratic Party.

Marie Newman is an American politician and marketing consultant who served as the U.S. representative from Illinois's 3rd congressional district from 2021 to 2023. The district encompassed parts of southwestern Chicago as well as many of its nearby suburbs, such as Oak Lawn, Western Springs, and Lockport. Newman was elected to the United States House of Representatives as the Democratic nominee, after defeating incumbent Dan Lipinski in the 2020 primary election.