Fact: 5.3 million African American men are denied the right to vote based on a past felony conviction.
That means more than 13% (39 mil) of the general African American population and 28% of the male African American population (18.5 mil) are prohibited from voting.
— Ten Facts About The Racist Criminal Justice System
Felony Disenfranchisement is highest in the former slave states and states with a history of civil rights violations like Florida and North Carolina. Today’s red states—particularly in the bible belt—where the Republican voting base is strongest, appear to have vested racist and political interests in permanently separating Black people from their right to vote.
This link provides information on each state’s voting laws for those with a felony record.