Poillevre needs this to happen soon, because:
- Ontario is likely to re-elect Ford, and Ford's desperate to squeak an election in before the feds do. Ontario almost always elects a separate party provincially and federally, Ford knows Poillevre is a liability for him, and Poillevre know the reverse is true. The difference is that Ford can call an election whenever he wants, while Poillevre has no such influence.
- US politics influences Canada, and Harris' popularity is taking the shine off the protofascist right-wing. Poillevre's seen his largest decline in polling ever last month.
This is a "strike while the iron is hot", and Singh would need to be colossally stupid to fall for it.