U.S. President-elect Donald Trump's vow to impose tariffs on China and Mexico unless they stem the flow of fentanyl and migrants across the U.S. border could impel deeper cooperation from those governments on drug policing,

Neither his claim that border crossings are an unchecked “invasion” nor his depiction of drugs pouring across an unguarded border has any basis in federal data.

The tariffs he imposed on China in his first term were continued by President Joe Biden, a Democrat who even expanded tariffs and restrictions on the world's second largest economy. Biden administration officials looked at removing Trump's tariffs in order to bring down inflationary pressures, only to find they were unlikely to help significantly.