Senate Minority Leader Mitch McConnell (R-KY) said he plans to file an amicus brief, or friend-of-the-court brief, supporting the multistate lawsuit challenging the Obama administration’s healthcare reform bill, Politico.com reported.

The lawsuit, which is currently being heard in a U.S. District court in Florida, contends that it is unconstitutional for Congress to require individuals to purchase health insurance. The lawsuit was filed shortly after the bill was passed in March. Court watchers expect the case to come before the U.S. Supreme Court.

The Obama administration argues that Congress is within its rights to require this mandate because it prevents taxpayers from picking up the tab when uninsured individuals seek treatment in emergency rooms. A McConnell spokesman told Politico that McConnell is urging fellow lawmakers to co-sign the brief.