Canadians are under no illusions that we will ever be a US state. If we ever were to be annexed, we would almost certainly be a territory without voting rights like Puerto Rico.
So if Canada were to join as states, it would be something like a Republican Western Canada and a Democratic Eastern Canada. Or some sort of strange split that gives 2+2. Definitely not the existing boundaries, because that'd likely be an 8/2 Democratic/Republican split.
Zero support for any legislation other than Canadian Separation. Be a poison pill.
And that's the non-violent response.