On the one hand, you can add the military to that transient population, and in Virginia, that's huge.
On the other hand, I live in Fairfax County, and it seems like every third car has a Nationals sticker or license plate or something along those lines. And I see far more Nationals ballcaps than Redskins' ones. Just let the Nationals get to a World Series, and they will rule the roost. Even the most loyal of Redskins fans can't stand Snyder. Wizards/Caps could also get very popular if they make it into their finals, but I think the Nats are best positioned. When I took my grandkids to see the Nationals, they were hooked. And how many more opportunities to see a Nats game live than to see any of the other teams in the area?