DC's shortage of amici
The NY Sun notices. DC is supported by five state AGs (the challengers have 30 lined up, last I heard, to support the 2nd Amendment), and 18 Congressmen (don't know the count, but I'd expect Parker/Heller to have 5-10x that many).
Their "scholars" brief was supported by two law profs and, what, 4-6 history profs.
UPDATE: lot of us have been wondering why there are so few. With AGs, it's easy: most of them are on the other side. With scholars, it's harder to call. One guess is that many historians may be chary of the Bellesiles affair, where they put their credibility on the line supporting his breathtaking new findings ... and were left holding the bag when it was exposed as bogus.