Democrats have no problem with either felons or dead people exercising their franchise.
It is wrong for them to vote, and it is wrong for noncitizens to vote.
One thing I've wondered, though: should being an illegal alien be a felony? More specifically, if an illegal alien eventually changes his status and works to become a citizen, should he be allowed to vote? After all, a felon who served his time and reforms himself into a good citizen still is prohibited from voting.
In a way, the loss of future franchise should be one of several deterrents to committing felonies. Should the loss of potential franchise be one of the deterrents to staying illegally in this country?