Canada will cut the lowest personal income tax rate to 14% from 15% on July 1, but Prime Minister Mark Carney’s new government won’t release a budget before the summer months.

The tensions set the backdrop for Carney’s decision to weigh in on the U.K.’s King Charles’s unprecedented move to invite Trump to visit his country. U.K. Prime Minister Keir Starmer personally handed Trump an invitation from the king, who is also Canada’s head of state, during a visit to the Oval Office in February.

The Canadian PM is navigating his role as a diplomat and statesman—not a politician on the campaign trail, writes David Moscrop.

Canadian Prime Minister Mark Carney said emphatically Tuesday that Canada is "not for sale" and "won't be for sale, ever" in an Oval Office meeting with President Trump, moments after Mr. Trump called the border between the U.S. and Canada "artificial" and romanticized the idea of Canada joining the U.S.

A meeting between the leaders of Canada and the United States is not usually considered a high-stakes showdown.

Prime Minister Mark Carney said he’ll consider altering environmental regulations passed by his predecessor, Justin Trudeau, in order to facilitate investment in major projects in Canada, including oil and gas pipelines.

President Trump and Canadian Prime Minister Mark Carney met in the Oval Office, where Carney told Mr. Trump that Canada is not for sale​, and never will be.