Since the April 2 rollout, the US Treasury has collected $64 billion in customs duties, or roughly $70 million a day through June 30.

Trump recently said he will impose a 35% tariff on Canada, the latest salvo in his on-again, off-again trade war with the U.S. ally and top trade partner.

Canada is one of the United States' top trading partners, with more than $410 billion of goods crossing into the country last year.

Trump, 79, notified Canadian Prime Minister Mark Carney of the incoming tariffs in a letter – one of dozens the president has fired off to foreign leaders this week ahead of an Aug. 1 deadline for

The move injects fresh turmoil into a strained bilateral relationship as Prime Minister Mark Carney negotiates a new economic partnership with the United States.

Canada's retail sales shrank by 1.1% in May as consumers curtailed car purchases and spent less at supermarkets, convenience stores and on alcohol, data showed on Thursday.

President Donald Trump’s vows to roll out punishing new tariffs on Aug. 1 have barely made a ripple with investors who are convinced he’ll once again back down. But at the White House, officials insist they’re serious this time.

President Trump’s new levies, which have pushed the country’s tariffs to their highest levels in decades, are typically paid by importers when goods reach U.S. ports. So there is little mystery about who makes that first payment.