[MsDemeanor]

Y'all are thinking waaaayyyyy too small.

1) All the Canadian conservatives move to the US
2) All the US liberals move to Canada or Mexico (depending on if they prefer hot or cold)
3) The US conservatives send every undocumented person back to Mexico, Central America, South America, Europe, Canada, Asia, and Africa
4) Liberals in Canada and Mexico (the US's two largest suppliers of imported oil) overwhelmingly vote to quit exporting oil to the US, on account of being offended by the conservatives complaining about having to import oil from countries that hate Americans (which, by now, Canada and Mexico will have become)
5) The entire conservative population of North America now resides in a country with food shortages from collapsed agriculture and poultry industries, spiraling deficits because all the rich hollywood and silicon valley liberals have left and taken their industries (and associated tax dollars) with them, reduced tourism because there's no one to clean the hotels and bus the restaurant dishes, and a severe oil shortage because the Middle East is now the US's only major oil source.