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Friday, April 11, 2025

Illinois Supreme Court Dismisses Redistricting Challenge to State Legislative Maps


The Illinois Supreme Court issued a ruling addressing time requirements for bringing constitutional challenges to a legislative redistricting plan adopted by the Illinois General Assembly. McCombie v. Illinois State Bd. of Elections.

Following the 2020 decennial census, the Illinois General Assembly adopted a redistricting plan (2021 Map) drawing new legislative districts to elect state representatives and state senators beginning at the 2022 general election. Plaintiffs challenged the 2021 Map arguing it was unconstitutional as the new legislative districts were not compact, contiguous, and substantially equal in population as required under the Illinois Constitution. Additionally, Plaintiffs argued the 2021 Map was an unconstitutional partisan gerrymander that denied voters and Republican candidates for the General Assembly a fair election.

The Illinois Speaker of the House and Illinois Senate President intervened in the case arguing the Plaintiff’s lawsuit was not timely filed and was barred under a latches defense because they had filed their  lawsuit more than three years since the 2021 Map was first adopted and two elections for General Assembly members had occurred based on the 2021 Map. The intervenors argued the lawsuit should be dismissed under their laches defense because Plaintiffs lacked due diligence in bringing their lawsuit and the opposing party experienced prejudice due to the delay.

The Illinois Supreme Court ruled against Plaintiffs and dismissed the lawsuit based on a laches defense. The Court noted Plaintiffs could have challenged the 2021 Map when it was first adopted and that waiting multiple election cycles to reveal the effects of the redistricting was unpersuasive. According to the Court, allowing Plaintiffs to challenge the 2021 Map now “would be prejudicial and create uncertainty for voters and officeholders alike, now and in the future, as to whether any redistricting plan in Illinois is ever final.”

Post Authored by Tyler Smith, Ancel Glink

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