Daniel Biss secured victory in a crowded 15-way Democratic primary with the endorsement of retiring U.S. Representative Jan Schakowsky. He balanced between the centrist and progressive sides of his party. His closest competitors were state Senator Laura Fine, a moderate, and Kat Abughazaleh, a progressive commentator.
During the general election, Biss ran against Republican John Elleson. With 92% of the votes counted, Biss achieved a commanding win, garnering 184,606 votes, which is 75.9%, compared to Elleson’s 58,728 votes. The Associated Press announced Biss’s victory less than two hours after the polls closed.
The 9th Congressional District of Illinois covers parts of Cook, Lake, and McHenry counties. Biss claimed the majority of votes in all these areas. Detailed results by county are available below.
For a breakdown of the voting results by county, refer to the table below. The leader tab highlights the top candidate in each county, while the all candidates tab shows total votes for each candidate.
Additional 2026 elections in Illinois provided noteworthy results, including the Governor race between Melissa Bean and Jennifer Davis, alongside the Congressional District 8 results.

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