Senate Republicans are starting to rally around a bill backed by Sens. Bob Corker (R-Tenn.) and Pat Toomey (R-Pa.) that would require congressional approval before the president invokes national security concerns to impose new tariffs.

It’s possible the bill could win enough support to be added as an amendment to must-pass legislation, at least raising the possibility it could get to Trump’s desk.

Senate Majority Leader Mitch McConnell (R-Ky.) on Tuesday said he would not bring the bill to a floor vote as stand-alone legislation, but acknowledged it might win support as an amendment to legislation such as the National Defense Authorization Act (NDAA).