BYD and other manufacturers are importing cars from China and scouting factory sites in Mexico as part of a global expansion that, for now, excludes the United States.

The announcement by Chad Chronister, a Florida sheriff with virtually no experience in the kinds of complex international investigations the agency handles, comes just three days after his selection.

The president-elect cares about financial markets, our columnist says. That gives investors a restraint on his decisions, even if it’s a tenuous one.

The president-elect’s opening salvo in trade and border talks with the United States’ neighbors is casting a harsh light on the North American alliance.

The president-elect’s threat to hit Canada, Mexico and China with new tariffs is already rocking business and diplomatic relationships and could topple the trade pacts he signed in his first term.

Why set off a tit-for-tat with our closest allies?

The dollar gained and investors sold off stocks after the president-elect promised to levy new restrictions on the United States’ biggest trade partners.

Plus, Matt Gaetz’s new gig.

The president-elect said that he would impose the across-the-board tariffs on Day 1 and that they would stay in place until Canada, Mexico and China halted the flow of drugs and migrants.

Could a tariff war erupt between the United States and Mexico? A top Mexican official said his country might retaliate if the Trump administration placed steep tariffs on Mexico.

Donald J. Trump has said he would transform America’s relationship with allies and adversaries. He has pledged to end the war in Ukraine in 24 hours, increase tariffs and deport millions.

Times foreign correspondents describe what’s at stake for the world, including China, Israel, Ukraine, global trade and climate.