What to know as President Donald Trump imposes steep new tariffs on imports from Canada, Mexico and China, prompting retaliation and countermeasures.

According to President Sheinbaum, Mexico has cut a deal with the U.S. to delay the tariffs. Under the deal, she said Mexico is sending another 10,000 members of its national guard to the southern border to combat drug traffickers, while the U.S. has agreed to do more to prevent the trafficking of high-powered weapons to Mexico.