Well, that's silly, not all states had a significant number of slaves.
But I would think that rescinding the right to vote would be a good start.
The founders did not grant the den of thieves the privilege of voting for very good reasons.
Re-electing a conviced felon as mayor just verified it...
Just FYI...at one point in time, slavery was legal in EVERY SINGLE ONE of the original 13 US colonies.