The scale of what lurks beneath the surface could be vast – can the Liberal leader defy the odds and win a fourth term?

Nearly two dozen backbench Liberal MPs signed a letter last week calling for the prime minister to step down amid fears within the party that his unpopularity could lead to a crushing electoral defeat in the coming months. The letter was separate from a “code red” petition to grassroots party supporters calling for a secret ballot vote on Trudeau’s leadership.