Every time Black folk&allies build enough power to make politics more fair, white supremacists use the 1-2 punch of mass incarceration & disenfranchisement to reinstate racial oppression.
So the antislavery coalition enacted the 13th, 14th & 15th Amendments to the Constitution.
White supremacists didn't like that, so they embarked on a decades-long campaign of terrorism and oppression known as Jim Crow.
Which was, in turn, met by modern mass incarceration and felon disenfranchisement, totally altering the political landscape.
And the white supremacists are, like clockwork, responding with a poll tax.
But, whatever, this is like the central theme of our shared political history so even lay people like me should talk about it. Happy to see corrections and edits if I've misspoken.