What are the tipping point seats?

A look at which ridings get each of the parties to 170 seats

There’s a concept in American psephology that I quite like: the tipping point state.

The idea is that you line up all the states based on how likely a candidate is going to win them, and the one that gets the candidate over 270 electoral college votes is the tipping point — any states won beyond that is just gravy.

It’s a useful way to frame an election f…