Court cases over US 2026 midterm election integrity and federal voter data actions

The tracker covers government-plaintiff and private challenges, with key dates in October 2026. In United States v. California (C.D. Cal., Judge Carter), the Ninth Circuit dismissed the government's appeal and the district court denied a TRO, with a hearing set for 13 November. In SEIU v. DOJ (N.D. Cal., Judge Thompson), a TRO issued on 30 October bars coercion of election officials and prosecution threats over ballot processing; the government appealed on 31 October and the TRO expires at 5 p.m. Pacific on 16 November. In California Nurses Association v. Mullin (N.D. Cal.), a preliminary injunction bars DHS election field operations in nine states, and the Ninth Circuit denied a stay and en banc review. In Common Cause v. DOJ (D.D.C.), the Voter List Maintenance Policy was vacated on 9 October.

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