The Department of Justice sued the Illinois Board of Elections, demanding the state produce its full, unredacted voter file, which contains highly sensitive and personal data on every voter in the state. This suit appears to be part of the federal government's efforts to build a national voter database without congressional authorization and to improperly question the validity of state voter rolls.

Congressman Michael Bost brought suit trying to prevent Illinois from counting mail ballots that are voted by election day and received within the following fourteen days, consistent with Illinois law. The Seventh Circuit ruled that Congressman Bost lacks standing to sue. Bost sought certiorari from the U.S. Supreme Court on the question whether he has standing as a federal candidate to bring his lawsuit and have it decided on the merits.   While the ACLU strongly opposes Congressman Bost’s position on the merits and has repeatedly defended similar state laws from challenge, the rules that determine whether Bost has standing to even bring his anti-voter lawsuit also apply to civil rights groups when they bring suit to expand or protect the rights of voters.

The ACLU, ACLU of Illinois, and the law firm Edelson PC filed a lawsuit on May 28, 2020 against Clearview AI alleging violation of Illinois residents’ privacy rights under the Illinois Biometric Information Privacy Act (BIPA). Plaintiffs in the case are the ACLU and ACLU of Illinois, Chicago Alliance Against Sexual Exploitation, Sex Workers Outreach Project Chicago, Illinois Public Interest Research Group, and Mujeres Latinas en Acción, who sue on behalf of their members, clients, and program participants.