President Donald Trump signed an executive order on Saturday that orders an investigation into U.S. imports of wood products, an industry that the president sees as “essential to the national security,

In his third new tariff probe in a week, Trump signed a memo ordering Commerce Secretary Howard Lutnick to initiate a national security investigation into U.S. lumber imports under Section 232 of the Trade Expansion Act of 1962.

U.S. President Donald Trump on Saturday ordered a new trade investigation that could heap more tariffs on imported lumber, adding to existing duties on Canadian softwood lumber and 25 per cent tariffs on all Canadian and Mexican goods due next week.