Partners are negotiating options in the face of international economic and security issues. Ms. Kehnemui is a 12-year veteran of FoxNews.com, where she was a reporter and then senior politics editor. She subsequently worked as managing director of digital communications at American Enterprise Institute.

While Mexico was spared from Trump's so-called "Liberation Day" tariff rollout on April 2, the 30% rate for the E.U. is 10 percentage points higher than what the president said he would apply to America's largest trading partner in April but lower than his mid-May threat of 50%.

Vice President Geraldo Alckmin (PSB) said on Tuesday (15) that the Lula (PT) administration's priority is to reverse the tariff hike imposed by Donald Trump before it takes effect on August 1—but added that a postponement could be requested if necessary.