But we'd only be 13 States instead of 50.
The Mississippi Basin would be populated with French Speaking Cheese Eaters and the Western United States would be part of the Republic of Mexico.
Uh, that's what it is now.
That’s certainly a possible outcome, but it depends on an assumption that a Britain free of the Hanoverians, or at least of George III would have continued to enforce the restrictions on Westward expansion.
An equally plausible outcome would be a politically independent America, operating as a member of a British Commonwealth as begin to emerge in the following century. In that case, not only would the West be in the fold, but all of British America including Canada, the Caribbean, and Central America would be united under the Grand Union flag.