The president, who has threatened and delayed other tariffs, said he will announce the new measures Monday. Canada and Mexico are among the U.S.’s top steel suppliers.

By Aaditya GovindRao and Adwitiya Srivastava (Reuters) -Shares of BlueScope Steel rose to a more than two-month high on Monday, buoyed by expectation that the Australian steelmaker's U.S. business would gain from potential tariffs on all steel imports into the country.