All along the 2,000-mile border, business leaders, border agents, migrants and their advocates are bracing for change in U.S. policies on trade and immigration.

With President Trump back in office, Mexico's President Sheinbaum braces for strained relations. U.S. public support for hardline policies targeting Mexico is on the rise, and looming energy reforms and trade negotiations add to the challenges.

President Donald Trump's promises of mass deportations, which could bring batches of new arrivals fresh off the border bridges into Juárez, has Mexican law enforcement preparing to keep watch for potential trouble.