Trump Tariffs: Trump Threatens to Double Mexico Duties

The trump tariffs threat landed on Thursday morning, when President Donald Trump warned Mexico that the duties on its goods would be doubled immediately unless it stopped a migrant caravan heading for the United States border. In a post on his Truth Social platform, Trump said the caravan had formed in the wake of last week’s midterm elections, and he told Mexico’s government to act now. “MEXICO MUST STOP THEM, NOW, and if they do not do so, the Tariffs on Mexico will be IMMEDIATELY DOUBLED,” he wrote. “There will be no leniency!” The warning raised the prospect of a fresh disruption to North American trade, and it put tariffs back at the centre of the president’s pressure on Mexico over migration.

Trump tied the threat directly to the election results. In the same post he wrote that “with the perceived loss by the Republicans in the Midterms – I WAS NOT ON THE BALLOT – the INVASION of our Country is taking place again.” Democrats won majorities in both the House and the Senate in the midterm elections, according to Associated Press projections. The caravan at the centre of Thursday’s warning set off on Tuesday from Tapachula, a city in southern Mexico near the Guatemalan border, and it is made up mostly of migrants from Central America who hope the change in Congress could open pathways for them to live and work in the United States.

What Trump Actually Threatened

The post was short, but its language left little room for doubt about the president’s intent. “Here we go again!” Trump wrote. “They will not be accepted!” He said Mexico had been informed of his demand, along with the governor of Texas, the US Border Patrol and Immigration and Customs Enforcement, known as ICE. “MEXICO, THE GOVERNOR OF TEXAS, THE VERY LIBERAL NEW GOVERNOR OF TEXAS, OUR GREAT BORDER PATROL, & ICE, HAVE BEEN SO INFORMED,” he wrote. The reference to Texas reflected the fact that the caravan is reported to be heading for the Texas border, and the mention of the state’s newly elected governor underlined how the politics of the midterm elections have fed into the dispute.

What the post did not do was specify which tariffs would be doubled, or when any new duties would take effect. The president did not say whether existing trade exemptions would remain in place, and he gave no figure for the rate that would apply. That gap matters, because the United States already applies several different layers of duties to Mexican goods, and doubling one layer would have a very different effect from doubling them all. The White House and the Office of the US Trade Representative did not provide an estimate of what doubling the tariff would cost American companies or consumers when they were asked on Thursday, and no federal agency has published a dollar figure for the impact.

The Caravan at the Center of the Threat

The group of migrants at the heart of the dispute is estimated at about 1,500 people, according to Reuters, although some reports have put the figure closer to 2,000. They set out on Tuesday from Tapachula, near Mexico’s border with Guatemala, and they are travelling north through Mexico toward the United States. Most of them come from Central America, and many of them are reported to have been encouraged by the Democrats’ victory in the midterm elections, which they hope could improve their chances of being allowed to live and work in the United States. The timing is what drew Trump’s attention: the caravan formed within days of the election, and the president has presented it as evidence that his political opponents’ win is already changing behaviour at the border.

Mexico Pushes Back

Mexico’s president, Claudia Sheinbaum, pushed back against Trump’s account of events at her daily morning news conference on Thursday. She disputed the president’s characterisation of the situation, saying Mexico has prevented migrant caravans from reaching the US border since Trump returned to office in January 2025. No migrant caravan has reached the northern border since Trump took office, she said, and her government has been stopping the groups long before they get anywhere near the United States. Her response amounted to a rejection of the premise of Trump’s threat: if no caravan is reaching the border, there is nothing for Mexico to stop, and no reason to double the tariffs.

Sheinbaum’s position reflects the approach her government has taken throughout Trump’s second term, working to intercept migrant groups in southern Mexico and to keep them from travelling north in large numbers. The two governments are also in the middle of trade negotiations, with Washington and Mexico City discussing trade issues and potential tariff reductions, including duties affecting Mexican steel and other manufactured products. The tariff threat therefore lands in the middle of an active negotiation, and it raises the question of whether the president is using the caravan as leverage in those talks, or whether the warning is a standalone response to the migration issue.

The Tariffs Already in Place

To understand what doubling would mean, it helps to know what is already in place. The administration imposed a 10 percent tariff on most Mexican goods in July, under Section 301 of the Trade Act of 1974, in a presidential memorandum published in the Federal Register on July 28. On top of that, the United States applies 25 percent tariffs on most goods that do not qualify for preferential treatment under the United States-Mexico-Canada Agreement, known as the USMCA, and 50 percent tariffs on steel and aluminium products imported from Mexico, alongside additional sector-specific duties. Doubling the 10 percent Section 301 duty would take it to 20 percent, but Trump did not say whether that is the duty he has in mind, or whether he means the broader set of tariffs as well.

The stakes are large because Mexico is the United States’ biggest trading partner. The United States bought 481.6 billion dollars in Mexican goods through September, more than from any other country, according to Census Bureau data, and bilateral commerce totalled 96.34 billion dollars in September alone. Tariffs on that scale of trade feed quickly into prices for American businesses and consumers, and they also hit the cross-border supply chains that run through both countries, from car parts to fresh produce. Freight and logistics companies warned on Thursday that another tariff increase would add disruption to supply chains that are already carrying the cost of the duties imposed earlier in the year.

What Doubling Would Cost Americans

The question of who pays for tariffs has been settled in the research, even if it remains contested in politics. The Congressional Budget Office estimated in February that foreign exporters absorb about 5 percent of tariff costs and that American consumers bear the remaining 95 percent. The Tax Foundation, using a model dated August 2026, estimates that all tariffs now in place will cost the average American household about 820 dollars this year, with about 130 dollars of that attributable to duties on Canadian and Mexican goods. Doubling the duties on Mexico would add to that bill, although no federal agency has published an estimate of by how much, and the White House did not offer one when asked.

That silence is significant, because the cost argument is the one the administration’s critics reach for first. Senate Democratic Leader Chuck Schumer introduced a bill in September that would terminate and refund the duties, and Democrats have argued that tariffs are a tax on American families rather than on foreign exporters. The administration’s supporters reply that tariffs are a tool of leverage, and that the threat alone can produce results without the duties ever being imposed. Thursday’s warning is a test of that argument: if Mexico acts against the caravan, the threat may never become a duty.

The Politics Behind the Threat

The tariff warning also shows how the midterm elections have reshaped the politics of the second Trump term. With Democrats set to take control of Congress in January, the president has lost the Republican majorities that shielded him from oversight for the first two years of his term, and he has responded by leaning harder on the executive powers he still controls, including tariffs. The caravan threat is an example of that: it is an action he can take without Congress, and it plays directly to the immigration issue that has defined his politics. At the same time, it hands his critics a fresh example of what they describe as rule by threat rather than by negotiation.

The administration’s own trade officials were careful on Thursday not to commit to the threat. US Trade Representative Jamieson Greer, asked on CNBC’s “Squawk Box” whether doubling Mexico’s tariffs was likely, did not say. The caution may reflect the fact that the United States Trade Representative already has a second Section 301 investigation open on Mexico, and that the two countries are in active talks about the duties on steel and other products. A formal doubling would need to be set out in a proclamation or a Federal Register notice, and until that happens the threat remains a post on social media rather than a policy. Greer’s refusal to endorse it suggests the administration has not yet decided how far to go.

What Happens Next

The next steps will be watched on both sides of the border. The first question is whether the caravan keeps moving north, and whether the Mexican authorities intercept it in the way Sheinbaum has described. The second is whether Trump follows through with a formal tariff order, and if so which duties he doubles and whether USMCA exemptions survive. The third is how American businesses and consumers react, and whether the prospect of higher prices on Mexican goods produces the kind of political pressure that has forced the administration to soften tariff threats in the past. The markets will also be watching, because tariffs on the United States’ largest trading partner have a habit of moving the prices of cars, food and manufactured goods.

For now, the warning stands as a test of the president’s leverage. Trump has told Mexico to stop the caravan now, with no leniency if it does not. Sheinbaum has replied that Mexico is already stopping the caravans, and that none has reached the northern border. Between those two positions there is room for a deal, and the trade negotiations already under way give both sides a table to sit at. But the post also shows that tariffs remain the president’s first instrument when he wants another country to act, and the coming days will show whether the threat was a warning or the first step toward a new round of duties.

Source: Reuters