Don’t think saying you are in danger of getting murdered by Trump supporters will work in Canada, the US is still considered a “safe” country. If you get a lawyer, and they can prove Trump drove you into a mad paranoia, then maybe they will. Or they’ll just send you to a nut house in the US.
You’d be better of marrying somebody for a day in Canada. That might not work though, there might be a minimum amount of time you have to stay married. But you might be able to marry any gender, that’ll increase your chance of getting somebody to marry you.
And you might stay married almost enough time, but she or he will decide she or he hates you, and doesn’t give a shit if you get kicked out of the country.