A group of about 2,000 migrants left Mexico's southern border Sunday in hopes of ultimately reaching the United States.

A group of about 2,000 migrants left Mexico’s southern border on Sunday, hoping to reach the country’s north and ultimately the United States.

Fewer migrants are reaching the U.S. border than in years. The U.S. government's secret weapon in cutting illegal crossings? Mexico. Mexico is holding the line, analysts say, thanks to a carefully negotiated – but unwritten – agreement between neighbors,

Some migrants, like Venezuelan Joel Zambrano, believe a new administration in the U.S. could put an end to asylum appointments.