From Maine to Montana to New Mexico, states across the U.S. will face significant economic issues from President Donald Trump’s trade war on Mexico and Canada.

Trump has vowed to impose 25% tariffs on all imports from Canada and Mexico, with 10% for Canadian energy. CEOs and economists say the action, covering more than $900 billion worth of annual U.S. imports from its southern and northern neighbors would deal a serious setback to the highly integrated North American economy.