Two incumbents of a Cook County agency responsible for making decisions about taxpayers’ property assessment appeals faced challengers in their reelection bids this year.

Evanston Mayor Daniel Biss has been declared the winner of a jam-packed Democratic primary race for Illinois’ 9th Congressional District seat, which is set to see its first new leader in more than 25 years.

The intense race has drawn tens of millions of dollars spent by outside groups on television, mail and online advertisements, with most coming from pro-Israel, pro-artificial intelligence development, pro-cryptocurrency and pro-cloud data center interests.

Illinois Democrats voted to choose their nominee for state comptroller, Illinois government’s chief fiscal officer, in a four-way race to succeed Susana Mendoza, who is stepping aside after nearly a decade in the office.

Cook County Assessor Fritz Kaegi has conceded defeat to Pat Hynes, a one-time employee of the two-term incumbent’s office.

Ten candidates were vying for an Illinois congressional seat in the state’s 2nd District, which is set for a new representative for the first time in more than a decade.

Incumbent Toni Preckwinkle has spent the past 16 years as board president. Running against her was Chicago Ald. Brendan Reilly, who has represented the city’s 42nd Ward since 2007.

More than a dozen Democratic candidates are squaring off Tuesday in a race for control of Illinois’ 7th Congressional District, a seat that’s been held by Congressman Danny Davis for nearly 30 years.

Four Republican candidates ran for a chance to unseat Democratic Gov. JB Pritzker in the Nov. 3 general election.

Four candidates (all Democrats) are on the ballot for three available six-year terms on the Metropolitan Water Reclamation District Board of Commissioners, all but one of them running as an incumbent.

Thanks to an evening surge in voters, Chicago's unofficial turnout for the 2026 primaries inched over 25%, with the tallying of additional mail-in and provisional ballots likely to boost the numbers even more.

Melissa Bean, who previously led Illinois’ 8th Congressional District for three terms, took a major step toward taking that seat back, as she has been declared the winner in Tuesday’s Democratic primary race.

When polls open Tuesday at 6 a.m., voters and poll workers will be greeted with sub-zero wind chills in Chicago. Could the cold have an icy effect on voter turnout?

Poll watching is one part of a broader response network the Chicago Lawyers’ Committee for Civil Rights, Illinois Coalition for Immigrant and Refugee Rights and Asian Americans Advancing Justice Chicago have partnered up to build in order to monitor possible cases of voter intimidation and federal immigration agents near polling places during the primary election. Legal volunteers, field volunteers, local rapid response teams and volunteer hotline operators will also be mobilizing as part of the effort.

With a little more than a week until the March 17 election, the debate hosted by WTTW News’ “Chicago Tonight” was the first after President Donald Trump launched the war against Iran that has already killed seven members of the U.S. military.

The cuts, imposed by the Trump administration, will hit the county’s bottom line next year, threatening the ability of more than 400,000 Cook County residents to get necessary health care.