What would it even mean to “sell” Canada? Whatever deal they make, the US could just back out of once Canada became a state, and Canada wouldn’t be able to do anything about it. It’s a non-sensical idea.

Selling territories makes sense, but selling your own sovereignty does not.

I honestly don’t see a way out of this other than a war against the fascists. Something like the American civil war where the racists got their asses thoroughly beaten, or WWII, where the Nazis got absolutely crushed. I feel like it’s just one of those things that pops up once in a while. Basically, fascists are the herpes of society.