Which Party has removed their Leader? We know that prior to the 2015 Elections there were several Conservative MPs that stepped down or even joined The Liberals and wanted Harper to resign.
It was purely Harper's decision to stay on. The Conservative Party made no attempts to remove him and he eventually lost by a landslide to the Liberals.
Did you then blame the Conservative party then? The FACT is both Harper and Trudeau had a mandate for up to 4 years and it was up to them if they wanted to step down!!
The difference is that Trudeau had much more pressure from his caucus and he then resigned!!