Canadian Prime Minister Justin Trudeau may be renowned internationally for his youthful persona and social media savvy, but even before the embarrassment of his recent black-face makeup scandal there were concerns about the support he needs from younger voters to win re-election.

Young Canadians wanting change after nearly 10 years of Conservative government played a critical role in electing Trudeau and his center-left Liberals in 2015, when he promised to tackle climate change, legalize marijuana and reform the electoral system — issues that resonated with younger voters.

The trouble for the 47-year-old Trudeau, pollsters say, is that these same voters are now frustrated after a series of Liberal scandals as well as the government's decision to buy an oil pipeline in an attempt to shore up Canada's key fossil fuels industry. The party is in a statistical tie with the opposition Conservatives in polls ahead of the Oct. 21 vote.