In response to this post, Reason’s David Weigel writes in:

It only has 38 delegates (15 chosen in the primary), but Obama’s going to win DC. If he survives super Tuesday he could pull off a Mid-Atlantic sweep – Maryland-DC-Virginia* – on Feb 12. Think of the irony – voters who live in the Beltway massively rejecting the Clintons! (It wouldn’t be as ironic as Ron Paul winning the GOP primary, which is possible if turnout is the same rock bottom 3000 it was eight years ago.) *He’s leading in the Baltimore Sun’s poll of Maryland. I haven’t seen one in Virginia, but he has the endorsements of Mark Warner, Tim Kaine, and former governor/current Richmond mayor Doug Wilder, as well as Bobby Scott (the Richmond congressman) and Rich Boucher (from southwest VA, deep Red country).

A sweep is easy to picture. If Obama’s running strong among African-Americans, he should do extremely well in the Maryland suburbs of D.C., in Baltimore, and those are the engines of Democratic turnout in the state. I concur with Weigel and the District (although Hillary’s support in the wealthier wards should be high) and I can easily see Obama winning Virginia.

Also note Virginia is the first state to elect a black governor, Doug Wilder.