Hoe exactly would this have been accomplished?
Liberia. It was a policy disaster. But it was the middle ground position short of abolitionism. But the Republicans were founded on the principle of anti-slavery (though not equality, though the Civil War likely changed a lot of their minds).
But the GOP was pro-business. And that meant large government investment. And new institutions like the bank and one regulated currency instead of scrip and the gold standard. The Democrats were the party of "states rights". So they have flipped on that issue, pretty much once Truman started rejecting a state's right to discriminate, but the transition wasn't really complete until LBJ signed the Civil Rights Act.
Also, a weak central government now helps large corporations, so the pro-business GOP flipped on that issue. Once the big government set up these institutions business needed, business immediately advocated for smaller government to not aid Labor.
This is in, admittedly, incredibly broad strokes.