Mexico’s President Claudia Sheinbaum has refuted President-elect Donald Trump’s claim that the two leaders have agreed to halt migration to the U.S. border.

Following a phone call on Wednesday, Trump posted online: “She has agreed to stop Migration through Mexico, and into the United States, effectively closing our Southern Border.” However, Sheinbaum quickly clarified that Mexico’s stance remains unchanged. She stated that the country’s policy is to address migration while respecting human rights, not to close its borders.

Trump’s statement comes amid his plans to impose sweeping tariffs on Mexico, Canada, and China upon taking office in January. On Monday, he vowed to implement a 25% tariff on all imports from Mexico and Canada until illegal immigration and drug trafficking to the U.S. are stopped. A 10% tariff on Chinese imports would remain in place until China curbs fentanyl smuggling.

Sheinbaum pledged retaliation should Trump’s tariffs trigger a trade war. “If there are U.S. tariffs, Mexico would also raise tariffs,” she said during a press conference on Wednesday.

Mexican Economy Minister Marcelo Ebrard joined Sheinbaum, criticizing Trump’s tariff plans as counterproductive. “It’s a shot in the foot,” Ebrard said, emphasizing the need for regional cooperation. He also pointed out that such tariffs would likely violate the USMCA trade agreement, which Trump himself negotiated during his first presidency in 2018.

The escalating rhetoric underscores growing tensions between the neighboring countries as Trump’s proposed policies loom large ahead of his January inauguration.