Even as Mexico President Claudia Sheinbaum attempts to quell concerns over Donald Trump’s threat of 25% tariffs, economists are looking glumly at the trouble ahead should the US president-elect actually follow through.

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.

Mexican President Claudia Sheinbaum says that the president-elect’s threat to enact massive tariffs on Mexican imports would lead to mutually assured economic destruction.