What if California, Oregon and Washington state joined Canada instead?

The classic

Trump, blathering, wants Canada to become the 51st state. As many point out, this makes no sense constitutionally for his party, as the State of Canada would have some 50 U.S. Representatives and 60 electoral college votes. The House and presidency would turn a maple shade of Blue for a generation. If Canada entered the U.S. as several states…