The Minnesota Legislature has a history of pushing constitutional limits on the size and scope of “omnibus bills” that have been signed into law.

Now one of the world’s largest health insurers is suing a state agency to prevent it from enforcing a provision it says would end its Medicaid contracts with the state, which was contained in a 1,400-page “jumbo omnibus” bill the DFL-controlled legislature passed during the final moments of the session this spring.

UnitedHealth Group, the Minnesota-based health insurance titan, filed the complaint Friday, Aug. 2 in state district court. It also names Attorney General Keith Ellison as a defendant. It has tapped Minneapolis-based law firm Faegre Drinker Biddle & Reath to serve as its legal counsel. UnitedHealth Group employs more than 400,000 people across the globe and generates more than $370 billion annually, but its headquarters are based in Minnetonka.

In the complaint UnitedHealth Group Inc. alleges that the legislature’s May 19 passage of HF5247—which constituted dozens of wide-ranging and unrelated provisions across several areas of government policy and expenditures—violates the “Single Subject Clause” of the Minnesota Constitution.