The seat has been held by Democratic U.S. Rep. Lauren Underwood of Naperville since 2019. Underwood is running unopposed in the Democratic primary.

U.S. Sen. Dick Durbin’s decision not to seek another term led to a cascade of candidates running for not just his seat, but several congressional districts.

Both Republicans running to represent Illinois’ 14th Congressional District cited financial issues among their top concerns – but the specifics varied greatly.

Reflecting what some experts see as a national trend, four of the six congressional representatives running for reelection in the North, West or Northwest suburbs next year are facing primary challenges.

Already crowded races for a pair of largely suburban Congressional seats got even more packed, and four representatives find themselves facing challenges within their own party, as candidate filing for the 2026 primary election wrapped up Monday.