Mark Carney, the new prime minister seeking a full term in Monday’s election, has built his campaign around President Trump’s threats to the country.

WASHINGTON — President Donald Trump said Wednesday that Canada would “cease to exist” if it weren’t for the United States — comments that came just days before Canadians are set to vote in an election dominated by Trump’s comments on the country’s economy and sovereignty.

While the trade battle is very real, the annexation talk has been largely dismissed as typical Trump bluster, a threat meant to throw allies and enemies off their game. There is n