Pressured by Trump, Mexico cracks down on migrants; many will never reach the U.S. border

From his home in Honduras, Yair Dubón paid close attention to the messages coming out of Mexico, where President Andrés Manuel López Obrador vowed he would not do the "dirty work" of the United States by cracking down on migrants passing through his country.Such assurances gave Dubón, a 38-year-old plumber, the push he needed to flee the gangs in his hometown and brave the journey through Mexico on his quest to reach the U.S. But on Wednesday, he found himself in a shelter in this city in southern Mexico, still more than 800 miles away from the U.S. border and unsure if he'd make it.

"It's really tough here," he said. "There are immigration checkpoints all along the highway. You can't trust anybody on the road."

Central American migrants like Dubón are learning that the Mexican government has abruptly changed its approach to the rising number of migrants passing through the country, no longer welcoming and assisting them, but instead arresting, detaining and turning back members of their caravans.

The humanitarian visas granted to migrants to live and work throughout Mexico have been cut off. The Mexican government has ordered bus operators to stop ferrying migrants across the country. Local police forces in several southern Mexican states have blocked migrants from entering town centers.