Prime Minister Justin Trudeau swept to power in 2015 with the help of younger Canadians captivated by his positive messaging and socially progressive views. That same group of voters may eventually be his undoing.

Trudeau’s chief rival, Conservative Leader Pierre Poilievre, has been making huge gains with younger voters since he began attacking the prime minister forcefully on the cost of housing. In public opinion polling, the Conservatives now lead Trudeau’s Liberal Party by a 2-to-1 ratio among voters 18 to 29.