President Donald Trump's 2024 campaign promise to impose steep tariffs on imports -- including those coming from close U.S. allies -- has some of his fellow Republicans in Congress worried about its potential hit to their home-state economies.

President Donald Trump warned Canada and Mexico to expect tariffs of 25% on exports to the United States starting Saturday.

President Trump says he's planning to add 25% tariffs on goods from Canada and Mexico starting February 1st. He says he would also put an additional 10% tariff on Chinese products by the same date. Trump says he's adding these tariffs because these countries are allegedly allowing mass numbers into the United States.