At best, we might get two Republican Senators out of Alberta and maybe one each from Manitoba or Saskatchewan. We will wind up with 16 to 18 Democrats in the Senate and probably 40 plus Democrats in the House. In other words, we would have permanent Democrat majorities in both houses of Congress. No thanks.
Congress used to require newly acquired lands to during “territory” status, then apply for statehood, either en masse or in subdivisions. Worked reasonably well, and the parties tried to balance the admission of 1 state with another of the opposite party affiliation.