The ThreeHundredEight blog has a follow-up on the recent Alberta election. Key point of interest:
The idea that the PCs and Wildrose share the same voter pool is simply wrong. The right wasn’t divided. Rather, the anti-PC vote was divided between the New Democrats and Wildrose.
I suspect this is a more general phenomenon: when it appears that some party won due to divisions in its main opponent’s base, things are quite likely not as they appear.