WASHINGTON—President Donald Trump on Tuesday warned that the North American Free Trade Agreement was “in play” and threatened to end aid to Honduras and other Central American countries if an organized protest march of 1,000 asylum seekers traveling through Mexico reaches the U.S. border.
“The big Caravan of People from Honduras, now coming across Mexico and heading to our ‘Weak Laws’ Border, had better be stopped before it gets there,” the president tweeted. “Cash cow NAFTA is in play, as is foreign aid to Honduras and the...