His own. Stevens won't be allowed to vote for his own reelection because dude is a felon as of half an hour ago.
The longest serving Republican in the Senate and a man many consider to be the most corrupt politician in Washington DC was found guilty earlier today of making false statements on his Senate financial disclosure forms. The seven felony counts could put Stevens behind bars for as many as 35 years, though that seems unlikely.
Alaska state law prohibits felons from voting until their time is served. (No word on whether Stevens will get to vote in the event he is sentenced to no jail time.) Stevens is currently neck and neck in his Senate race against Anchorage mayor Mark Begich. We'll soon see if Alaska is red enough that a Republican can win reelection despite being a convicted felon and despite being unable, by law, to support his own cause. More here.