AH Challenge: La Follette elected in 1924

While I was thinking about one of my TL projets, I just wondered how the rural-oriented Progressive Party of 1924, led by La Follette, Sr. and Wheeler, could have won the election. I have thought about Coolidge not running because of an earlier death of his son (and who would replace him?) or McAdoo being selected as candidate and running an awful campaign.
 
My guess is have a really reactionary Dem candidate and have the teapot dome scandal come out with Harding having survived and being the Republican candidate, possibly with a big row and walk out from both conventions.
 
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