Trump threatens to double tariffs on Mexico over migrant caravans as Mexico’s president pushes back

President Donald Trump threatened to double tariffs on Mexican goods if Mexico, the top US trading partner, does not stop a migrant caravan heading for the border².

Mexico’s president pushed back on the threat³. She rejected Trump’s description of the caravans as an invasion⁸.

US Trade Representative Jamieson Greer, asked in a television interview on Thursday whether doubling Mexico’s tariffs was likely, did not say⁵.

The threat ties trade policy directly to migration, using tariffs on the largest US trading partner as leverage over Mexico’s handling of the caravans^2,7. Greer’s refusal to say whether the doubling was likely leaves its status unclear⁵.

The White House case

The White House said that days after the midterms, caravans of migrants were “already marching north” to the United States and were counting on Democrats to let them in¹. It said congressional Democrats were vowing to abolish ICE, dismantle the Department of Homeland Security, stop deportations and grant amnesty¹.

These are the administration’s claims about the caravans and about Democrats’ positions. The coverage available does not independently confirm the size or route of the caravans^1,2.

Trump has also said he does not care about the USMCA³.

The White House framed the caravans as a direct result of the midterm results, saying they began moving days after the vote¹. Mexico’s president, by rejecting the language of invasion, disputed that framing⁸.

Why it matters to investors

The threat lands during sensitive trade negotiations. The United States and Mexico are engaged in talks on tariffs on several Mexican products and on the review of the USMCA⁷. The agreement entered its formal joint review process in July 2026, with separate bilateral negotiations between the two countries⁸.

Trump declined in July to extend the USMCA⁶. Existing measures in the talks include 25 percent tariffs on certain trucks and 50 percent duties on steel and aluminium⁴.

A doubling of tariffs on goods from the largest US trading partner would affect supply chains that cross the border, including in vehicles and metals already covered by the existing duties^2,4.

What to watch

Whether the threat becomes a formal tariff order, and whether it is tied to a deadline, has not been set out in the coverage so far^2,5. Mexico’s response in the bilateral talks, and any change in the USMCA review timetable, are the next markers^7,8.