At the state level, most offenders (55%) are locked up for violent crimes. Another 17.5% were convicted of serious property crimes, like burglary. Drug possession only accounted for 3.5% of state prisoners. Drug offenses make up a good share of the federal prison population (47%), but that's almost all trafficking, not possession. I'm all for drug legalization, but most people who engage drug trafficking aren't the best people in the world, and I'd prefer that they not be allowed to vote. I'm definitely happy with murderers and rapists not voting.