A Blue Battle in Illinois: Democrats Jockey for Durbin’s Open Senate Seat

With Senator Dick Durbin retiring after nearly 30 years in the U.S. Senate, Illinois Democrats are confronting a rare moment: an open statewide seat in a deep‑blue state with no clear heir apparent. Durbin, first elected in 1996, will complete his term on January 3, 2027. Illinois’ junior senator, Tammy Duckworth, also a Democrat, was re‑elected in 2022 and serves through January 2029.

The Democratic primary will be held on March 17, 2026, and although eleven Democrats have filed, the contest has consolidated around three major candidates: Robin Kelly, Raja Krishnamoorthi, and Juliana Stratton. Each brings a distinct political base, résumé, and theory of the race — and polling shows a competitive, unsettled electorate.

Robin Kelly

Kelly, a U.S. Representative from Illinois’ 2nd District since 2013, is known for her work on gun‑violence prevention, health equity, and community development. Before Congress, she served as a state representative and later as chief of staff to the Illinois state treasurer. Kelly polls behind the top two contenders but retains a loyal South Side and suburban base.

Raja Krishnamoorthi

Krishnamoorthi, the U.S. Representative from the 8th District, has built the most formidable fundraising operation in the race — reporting roughly $30 million raised. First elected in 2016, he has gained national visibility through his work on the House Oversight Committee. According to NPR Illinois, Krishnamoorthi has polled between 29% and 43%, often leading the field.

Juliana Stratton

Stratton, the Lieutenant Governor of Illinois, entered the race with strong statewide name recognition and deep ties to Democratic constituencies. A former state representative and longtime advocate for criminal‑justice reform, she has surged in recent months. Some polls have shown her overtaking Krishnamoorthi, and she benefits from major financial backing — including $5 million from Governor J.B. Pritzker to a supportive PAC.

A Race Still in Motion

Despite the frontrunners’ advantages, 15% to 30% of Democratic voters remain undecided, leaving the final outcome far from settled. USA Today and Ballotpedia both note that while ten Democrats will appear on the ballot, the race has effectively narrowed to these three contenders. Polling has consistently shown a three‑person race, with Krishnamoorthi often leading. NPR Illinois reports that he has polled between 29% and 43%, though Stratton has gained momentum and even topped a recent survey. Kelly remains competitive but trails the other two in most public polling. Notably, 

For Democrats, the stakes are straightforward: selecting a successor who can carry Durbin’s legacy while shaping the party’s future direction in a reliably Democratic state. With high fundraising, shifting polls, and a large undecided bloc, Illinois’ March 17 primary is poised to become one of the most revealing contests of the 2026 cycle.