Tariff watchers says Trump's bowing to struggling U.S. farmers and construction industries won't have significant impact in Canada, but is a sign he will cut levies that hurt American businesses.

President Donald Trump lowers tariffs on select steel and aluminum imports, expands 25% duties, and extends measures through 2027.

A proclamation signed late Monday by U.S. President Donald Trump will amend his Sec. 232 national security tariffs on some aluminum, steel and copper imports, lowering them from…