I voted for the guy that says everyone wants him to lose. He wants to push the limits of the position to really act as an advocate for Arlington's citizens. He has no chance of winning. And the other guy just seems too comfortable. He's stopped trying.
Also, the other guy has this horrible youtube video up with the Chairman of the Arlington County Board of Directors endorsing him and saying that no one is going to be voting in the primary, so at least you won't have to battle the lines at the polls. I don't know when I get to vote against this guy, but it's on. Maybe I'll even run against him. Voter apathy is not an appropriate marketing tool, dude.