I also think the basis of this poll to be a bit sacrilegious but will play along anyway
Nats. Simply because they play where I'm based and, much aside from that, they deserve the followership. A humble, young team that plays the way the game should be played. In a town very deserving of this team after decades in baseball Siberia. Can live in a place with a chronically bad team--that's one thing. Living in a place where the team was stolen or fled...twice...is a different matter.
However, so there's no mistake, should the two teams face each other, I'll be attending and watching wearing all Reds garb while hoping for a sweep.