He'd probably be blamed for the Great Depression even more than Hoover, but do better in the Northeast
This is a myth as while yes the 1929 crash kicked of the depression , Hoover’s response to it is why it was a depression and not just a recession. Hoover made the decision to let the banks fail in the Fall of 1930 which turned a recession into a depression, he made the decision to appoint Meyer to the fed who then responded by implementing a hard money policy and he signed Smoot-Hawley .
Now you can argue Coolidge would have done the same things but it’s always easier to blame the incumbent who actually did it then a non incumbent who probably does the same things .
He still loses but I’d say by 9-10 points rather than 18