After nearly a decade in power, Canadian Prime Minister Justin Trudeau finally bowed to a chorus of criticism that had become too loud to ignore, announcing his resignation on Monday. Among the loudest critics was one of his most loyal and longest-serving deputies.

Canada’s governing Liberal Party will announce the country’s new prime minister March 9 after a leadership vote that follows the resignation of Justin Trudeau this week.

The leadership change comes at a challenging time for Canada, with domestic and international pressures mounting.