This is often overstated. While there's certainly a lot of aspects of American government where both sides are to the right of Canada (or whatever social democracy you want to insert), it's by no means completely universal.
Take immigration - Canada has merit-based immigration with language requirements, and not a lot of tolerance for illegal immigration, which is considered firmly a right wing position in the states.
Take immigration - Canada has merit-based immigration with language requirements, and not a lot of tolerance for illegal immigration, which is considered firmly a right wing position in the states.