I suspect Glenn’s got this one [1] right..
PREDICTION: Watch for Virginia Democrats to come out with something, anything, on some Virginia Republican as a distraction. It won’t matter if there’s anything to it or not, expect the press to treat it as gospel. This Virginia stuff is killing them, and they’ll do whatever it takes to change the subject.
I have every reason to suspect that they’re already digging for such a distraction, but rather like Bob Mueller’s stable of young Democrats, they haven’t managed to come up with anything.