Even his own party is signing up.
But Trudeau knows that under the current demographics and seat structure, the absolute worst the Liberals will ever finish is in the NDP's current position in a minority government. It's a fait accompli.
There is no possible way the PC party itself will ever win a Canadian election ever again, and their only slim chance is if the Bloc gets off their asses and starts winning some seats in Quebec to qualify for a minority government.