Mexico’s president, Claudia Sheinbaum, warned US President-elect Donald Trump on Tuesday that his vow to impose high tariffs on all imported Mexican goods would inflict harm on both countries.

President Claudia Sheinbaum suggested Tuesday that Mexico could retaliate ———with tariffs of its own, after U.S. President-elect Donald Trump threatened to impose 25% import duties on Mexican goods if the country doesn't stop the flow of drugs and migrants across the border.

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.