Most of the DC area can get WBAL (1090 on the dial). They do cut power at 4:45 in the winter, and Ron Smith's show is on from 3-6 pm. I listen to it in the summer, and for the first hr. 45 mins. in the winter.
It's a good source for MD politics, which are totally absent from DC stations.
I like Chris Core on WMAL at 6PM....gave up on Ron Smith when he started trashing our presence in Iraq....