Eric,
 I'm sorry, that was a tongue in cheek  response to what I think is an absurd idea. I just tried to take the idea down to its  illogical conclusion and you're right, Democrats would love to be able to register AND  vote on other people's behalf.  I think they have always believed that they 'know what's best' for us, so voting in our stead makes perfect sense to a liberal.
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 Voting has never been that  convenient, nor should it be. Democracy was never meant to be convenient. In fact, I think it should be a little inconvenient as  it  sure wasn't all that convenient for those who fought and died to preserve our right to vote. Standing in line or mailing your ballot is the 'least' we can do.  In California, illegal aliens are given a license to drive and the state automatically registers people who have a drivers license.  People who blur the lines between citizen's and non-citizen's or illegal aliens really don't  care if 'ineligible' people vote, as long as its for a Democrat.