Mr. Trump accused Mexico of allowing a “mass migration invasion” into the United States, claiming that this had brought “crime, and drugs,” crushed wages and overwhelmed school systems.

Venezuelan migrants handed over to Mexico like it’s a U.S. immigration detention facility. Families from Central Asia flown ...

Trump’s mass deportation plan faces delays as mega shelters in Mexico set up to receive deportees remain empty.

Trump isn’t alone in using tariffs, travel bans and sanctions to make countries play ball on deportations. But the other side of migration diplomacy can be incentives for countries willing to take on ...