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.

Under growing pressure from his own party, Canadian Prime Minister Justin Trudeau has announced he will step down and end his nine-year stretch as leader. Trudeau said he would stay on in office until his Liberal Party can choose a new leader, and that parliament would be prorogued - or suspended - until 24 March.