38 GOP lawmakers join Ron Johnson’s Obamacare lawsuit

This item has been updated.

Thirty-eight Republican lawmakers are signaling support for a lawsuit filed by Sen. Ron Johnson (R-Wis.) that challenges a rule by the Obama administration allowing the federal government to subsidize health insurance for lawmakers and some congressional staffers.

With the health-care law exceeding enrollment expectations and legislative attempts to undo the law failing to advance beyond the GOP-controlled House, Johnson's lawsuit is one of the few other attempts underway to chip away at the law.