People are generally impatient, irrespective of their political leanings, with governments.
I don't mean in a small-c conservative sense (anti-government); but rather with ineffectual politicians/leaders who fail to implement meaningful parts of their platform, who fail to actually raise the standard of living, at least modestly, for majority.
I expect, in any minority scenario, there will be a high degree of pressure to show accomplishments of some kind.
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In the event this goes as it currently appears (Liberal minority) I expect that pressure will be somewhat more left-leaning.
But if its a Conservative minority, I expect similar pressure, albeit it from the right and the centre........putting any such government between a rock and a hard place.
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As to the timing of any subsequent election; if there's a majority......not a day under 4 years, you would think................but if its a minority, I think a lot will have to do with allowing for leadership changes.
If he doesn't become PM, O'Toole will be under immense pressure to go; if Trudeau holds on only to a minority, given how polarizing he's become, I expect much the same. Even with a majority, I'd be surprised
to see Trudeau run for a 4th term.