Calvin Coolidge wouldn't even support today's conservatives. He was against free trade and believed the rich should bear all of the tax burden.
And we all know Barry Goldwater hated the GOP by the time he was put in the grave, much less what he'd think now.
Protectionism was the pro-business, neoliberal position on trade in Coolidge's age, so let's not act like this was some position comparable to modern Democrats.
Well that probably has to do with the fact that American business interest is now defined by the FIRE sector rather than manufacturers.