Basically put, Borah wins by huge margins, basically combining Progressive and Rump Republicans:
Senator William E Borah (R-ID)/President John Calvin Coolidge (R-MA) 405 electoral votes, ~68% of the popular voteFormer Ambassador John W Davis (D-WV)/Governor Charles W Bryan (D-NE) 126 electoral votes, ~30% of the popular voteSeriously, if Borah manages to get nearly all the Coolidge vote plus all the LaFollette vote, he has the potential to get over 90% in Minnesota. What's unaccounted for in this scenario, however, is the question of whether Conservatives might flee to Davis with a Progressive like Borah heading the ticket.