Two Democratic cosponsors have signed on to a House Republican bill that would end warrantless surveillance by the Internal Revenue Service and other federal agencies.

Ranking House Judiciary Committee member John Conyers, D-Mich., and Rep. Peter Welch, D-Vt. are cosponsoring the Cell-Site Simulator Act proposed on Monday by Rep. Jason Chaffetz, R-Utah. The bill would force state and federal agencies to seek a warrant before using devices often referred to as “Stingrays” that pose as cell phone towers in order to capture cellular data.