Senate Republicans are exploring possible next steps to curb President Trump’s authority to impose tariffs for national security reasons without congressional approval, a day after a nonbinding vote and increasing fears that Trump has already sparked a dangerous trade war.

Wednesday’s nonbinding vote in the Senate passed with overwhelming support in what many described as a sharp message to the president against his trade war. There are no signs that further action is imminent, but it’s an issue that some Republicans are giving more thought to, especially among Republicans who worry that other nations’ retaliatory tariffs against the U.S. are starting to hit home, particularly among Midwest farmers.