Sen. Jeff Flake, R-Ariz., said Tuesday that the Senate will vote on a motion on Wednesday aimed at challenging President Trump’s authority to impose tariffs on imports under Section 232 of the Trade Expansion Act of 1962, which permits a president to implement tariffs on “national security grounds.”

“FINALLY, Senate will push back on the President’s abuse of Section 232 to impose tariffs,” Flake tweeted Tuesday evening. “We will vote Wednesday on a ‘Motion to Instruct,’ a first step toward reasserting Congress’s constitutional role on tariffs.”