We've seen this play out. Johnson passes the Civil Rights Act, southern whites (or white working class as we call them today) flip out and go Republican. The far left is enraged about a conflict overseas and protests. Johnson becomes unpopular and drops out. Corrupt Republican wins. Rinse/repeat. Biden's economic policies helped people of color, white people got angry, the far left lost their mind over Gaza, Biden is forced to drop out, corrupt Republican wins.