Cities Sue Trump Administration Over ACA Rule Changes Impacting Coverage
A coalition of cities, including Columbus, Ohio; Chicago; Baltimore; and Pima County, Arizona, has filed a lawsuit against the Trump administration to block recent changes to the Affordable Care Act (ACA) marketplaces. The plaintiffs, which also include Doctors for America and the Main Street Alliance, argue that the new rule, finalized in May 2026, could result in 3 million people losing their health coverage. The rule expands access to catastrophic and non-network plans as lower-cost alternatives, which critics say could leave consumers vulnerable to high costs. The lawsuit claims that the rule contradicts the ACA's goal of providing affordable health coverage to all Americans by creating barriers to coverage. The plaintiffs assert that the rule is part of a continued effort by the Trump administration to undermine the ACA.