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.

The administration is showing it doesn’t view the House and Senate as equal partners. So far, Republicans, who hold both majorities, are accepting their new status.

Mexico is the United States' largest trading partner, representing over 15% of total trade. The U.S. imported more than $475 billion worth of Mexican products in 2023, a figure that has grown about 70% over the last decade,