How did Justin Trudeau become leader of the Liberal Party in 2013?

In April 2013, Justin Trudeau became the leader of the Liberal Party of Canada after mounting an exhaustive campaign to succeed interim leader Bob Rae.12

He secured the leadership by winning a crowded field in an online and phone-in vote, capturing nearly 80 percent of the more than 100,000 votes cast. His victory was widely seen as a pivotal moment for the party, which had been struggling following a poor performance in the 2011 federal election where it had fallen to third-party status.12