“It’s a rare opportunity for Democrats to see an open congressional seat in the Washington suburbs, and that means that you have a huge field and a huge amount of money being spent,” said Stephen Farnsworth, a political science professor at the University of Mary Washington. “This may end up being one of the most expensive Democratic congressional primaries in the history of Virginia.”

The Democratic primary in Virginia’s 10th congressional district is getting expensive. Where is all the money coming from? (WAMU)