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.
This.
1920s Republican Trade Policy: Don't make my American factories compete with British and German factories.
2010s Republican Trade Policy: Let me keep my American factories in the Philippines and Vietnam without any tariffs or penalties.