President Claudia Sheinbaum is detaining more migrants, seizing more fentanyl and positioning her country as a key ally against China. But the U.S. stance has shifted, too.

How will Mexican leaders respond if, as expected, Trump pressures them to accept deportees from third countries? 'Mexico is in a really tough spot.'

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.