Why did the Liberal Party of Canada form a majority government after the 2015 federal election?

The Liberal Party of Canada secured a majority government in the 2015 federal election primarily due to the leadership and campaign performance of Justin Trudeau, combined with growing voter dissatisfaction with the incumbent Conservative government led by Stephen Harper.12

Several key factors contributed to this outcome:

• Charismatic Leadership: After the party’s historic low in 2011, Trudeau revitalized the Liberals. His youthful, charismatic image and effective performance during debates resonated with the electorate, leading to a surge in support often referred to as "Trudeaumania."12
• Strategic Positioning: Trudeau successfully positioned the Liberals to the left of the New Democratic Party. By advocating for deficit spending to fund infrastructure, he offered a clear alternative to the NDP’s more centrist approach of balancing the budget.1
• Conservative Vulnerabilities: The Harper government faced significant criticism regarding its economic stewardship, particularly following a period of recession and depressed oil prices. Additionally, the campaign was marred by controversies, including the trial of Senator Mike Duffy and divisive rhetoric regarding immigration and religious attire.2

Ultimately, the Liberals captured 39.5 percent of the vote, resulting in 184 seats and a decisive majority.12