Troops in Nogales, Mexico, have found 150 fentanyl pills, according to official statistics. Meanwhile, U.S. officials across the border have seized more than 400,000.

President Donald Trump on Monday said Canada and Mexico have "no room left" to avoid his impending 25% tariffs on all imports.

Officials from Canada and Mexico have been on a promotional blitz in Washington to tout their efforts to crack down on fentanyl trafficking and secure the border in hopes of holding off tariffs from the U.