When President Donald Trump last rolled out tariffs this high, financial markets quaked, consumer confidence crashed and his popularity plunged.

The poll suggests that 55% of Canadians still say the U.S. remains this country's most important ally, but also says that 59% ...

The administration's missives reupping — but also delaying — his tariff threats are further souring the mood toward the US ahead of Secretary of State Marco Rubio's trip to the region.