I dont think anyone from the EU is going to take concrete steps to a Canadian application, because they havent concretely ruled out that America wont physically invade it. Its an insane prospect, but this world is already insane.

Europe is already dealing with a hostile Russia, They can probably handle Russia alone, They can't handle Russia + America, so unless we're all ready to write it off and Blast each other with nuclear weapons, I think Europe has quietley agreed that if America does turn psycho, and the cost of keeping America Neutral, and not allied with Russia, is sacrificing Canada, they will Sacrifice Canada in a heartbeat. Officially, at least

Unofficially it will just be a fucking shadow war.