Some countries 'may be exempted from US tariffs'
“We expect that the president will sign something by the end of the week and there are potential carve-outs for Mexico and Canada based on national security, and possibly other countries as well based on that process,” White House spokeswoman Sarah Sanders told a regular media briefing.
Trump is expected to sign a presidential proclamation establishing the tariffs during a ceremony scheduled for 3:30 p.m. (2030 GMT) on March 8, a source familiar with the situation said.
A senior U.S. official said the measures would take effect about two weeks after Trump signs the proclamation.
The tariffs would impose a duty of 25 percent on steel and 10 percent on aluminum to counter cheap imports, especially from China, that he says undermine U.S. industry and jobs.