President Trump’s threat to impose steel and aluminum tariffs has some Republicans so worried that they’re considering legislation to curtail the power of the president to control trade policy.

Trump has said he would impose 25 percent tariffs on all steel imports and a 10 percent tariff on aluminum, both in the name of national security. He’s legally allowed to take that step, but many Republicans worry the move would spark a trade war that brings devastating economic consequences to the United States.