I learned about this issue from Ep. 19 of The Breakdown with Shaun King podcast. The episode title is: Do you even have the right to vote? I really recommend listening to The Breakdown. Shaun King breaks things down very clearly and gives us action steps.
The action for Ep. 19 was to research this issue more on: www.righttovoteamendment.com.
(Note: If the links in the body of text don't work, use the top navigation.)
I also am reading about this:
Dozens Of Civil Rights Groups Ask Presidential Candidates
To Support Letting People In Prison Vote
If you want to get started with the podcast, google: The Breakdown with Shaun King
I use the podcast player Podbean if you want my suggestion. I am new to listening to podcasts myself. This is my first!