Cameron and impolitical have already picked up on the fact that the Cons' candidate in Montmagny-L'Islet-Kamouraska-Rivière-du-Loup is effectively running to turn the party into something other than what it is. But I'd think it's worth wondering just where that decision came from, particularly in a party notorious for message control (as epitomized by their refusal to allow a single one of their MPs to talk about the gun registry on national TV today).
Cameron speculates about Bernard Genereux "going rogue". That's certainly one possibility - and if it's true, the Cons may well be hoping for Genereux to merely hold a close second place in the riding rather than becoming an inside voice against their environmental neglect.
But I'd think there's another equally plausible possibility as well. Could it be that the Cons have authorized Genereux to criticize them based on a conclusion that he can only win the by-election as an anti-Conservative? And might that make for a rare crack in the Cons' PR facade which has the potential to weaken the entire structure?