what are the voting rights of ex-felons?

This was a question put to me by someone I tutor at the jail, and I realized I didn't know the precise answer. I said I'd find out. Seeing as a quarter of the US population one in every thirty-two people in the United States will spend some time behind bars (though not necessarily for felonies),** it's a very cogent question.

It turns out to vary from state to state. The table below comes from State-Level Estimates of Felon Disenfranchisement in the United States, 2010, by Christopher Uggen, S...