President Trump, who has insisted Aug. 1 is a firm deadline for countries around the world, said that "the complexities of a Deal with Mexico are somewhat different from other Nations."

President Donald Trump signed an executive order Thursday that would have new tariffs on a wide swath of U.S. trading partners to go into effect in seven days — the next step in his trade agenda that will test the global economy and alliances.

“IEEPA nowhere mentions tariffs, duties, imposts, or taxes, and no other President in the statute’s nearly 50-year history has claimed that it authorizes tariffs,” the companies added in a filing with the appeals court.