The most likely candidate to succeed a Liberal PM is a Conservative. Eventually this will happen. The candidate will be chosen by Conservatives. The majority of Canadians who swing the election will not be deeply politically involved or aware; the worse the party in power is at dealing with the events of the day, the more extreme the alternative can be and still be electable. Those who care deeply about narrow issues will mostly have no influence at the point in time when the mob swings. At each election opportunity, the choice is "this one, or wait for the next one"? Sometimes, the choice is "the bad fit now while I have some influence" versus "the worse fit later when the mob decides".