Mexican President Claudia Sheinbaum says Mexico could retaliate with tariffs of its own, after President-elect Donald Trump threatened to impose 25% tariffs on Mexican goods if the country doesn’t stop the flow of drugs and migrants across the border.
This site has probably the best visualizer (scroll past the first section to get the free historical data): https://oec.world/en/profile/country/mex?yearlyTradeFlowSelector=flow1
TL;DR: Lots of things. $300 billion worth of things.