Illinois voters are choosing nominees in high-stakes primary elections that will shape a new generation of Democratic leadership in the state’s congressional delegation. The retirement of longtime Senator Dick Durbin has sparked a crowded and competitive race, while multiple open House seats across the Chicago area have drawn dozens of candidates. In heavily Democratic districts, primary winners are widely expected to prevail in November.

The Senate contest has centered on Representatives Raja Krishnamoorthi and Robin Kelly and Lieutenant Governor Juliana Stratton. Krishnamoorthi has led in fundraising, while Stratton has received strong backing from Governor JB Pritzker, who recently directed millions of dollars to a supportive super political action committee. Debates have featured sharp exchanges over campaign donations and immigration policy, reflecting broader tensions within the party.

Outside groups, including organizations supporting Israel and industries tied to cryptocurrency and artificial intelligence, have poured significant funding into several House primaries. Retirements by veteran lawmakers in multiple districts have created especially crowded fields, with some races drawing more than a dozen candidates.

On the Republican side, several candidates are competing in the Senate and gubernatorial primaries, though Democrats remain dominant statewide. Election officials are hoping for stronger turnout after the last primary drew historically low participation.