Amid warnings of price increases, Canada moved quickly to retaliate, China said it had planned countermeasures and Mexico said it would soon unveil its response.

While many issues turned Canadians away from their prime minister, the high cost of groceries and homes has become a chief grievance.

By suspending Parliament and promising to resign, the prime minister bought the Liberals time. But Canada will now face Donald J. Trump with a lame duck in charge.

Justin Trudeau announced Monday that he was also stepping down as leader of Canada’s Liberal Party. He will remain in both roles until a replacement is chosen.

The Canadian prime minister, who said on Monday he would step down, has spent a quarter-century in the political spotlight.

Whoever replaces Mr. Trudeau as the leader of Canada’s Liberal Party will become the prime minister. Not long after they’ll face a general election, and the daunting challenge of keeping the job.

President-elect Donald J. Trump has threatened to impose tariffs on Canadian exports unless the country stops the flow of migrants and fentanyl to the U.S.

Avelo Airlines and Breeze Airways have found success and loyal customers by serving airports in smaller cities, like New Haven, Conn., that were neglected by national carriers.

On the internet, the truth and the manufactured lies about celebrities are hard to sort through.