Ontario's ad criticizing tariffs aired during the World Series, hours after President Donald Trump said he'd slap new tariffs on Canada.

Canada and the United States are neighbors, allies and best friends. We have stood shoulder to shoulder on the battlefield, defending shared values of freedom and democracy. Free trade between our two countries has ushered in decades of unprecedented wealth and prosperity, creating millions of jobs on both sides of the border.

The leader of Canada’s most populous province posted remarks by former U.S. President Ronald Reagan on social media on Friday showing Reagan opposed tariffs, hours after President Donald Trump announc

President Trump abruptly called off trade negotiations with Canada on Thursday over an anti-tariff ad campaign, featuring the voice of Ronald Reagan, funded by the government of Ontario.

The Senate passed a resolution aimed at ending President Donald Trump’s tariffs on Canada, with four Republicans joining Democrats to rebuke the administration’s trade policies a day after they voted to terminate tariffs on Brazil.

Ontario Premier Doug Ford said he will pause the ad on Monday "so that trade talks can resume."