Congressman Tom Davis (R-VA) hasn't even yet announced his widely-expected Senate candidacy, but Democrats are already gearing up to run for his seat. Former Congresswoman Leslie Byrne has notified liberal Virginia bloggers that she's formed an exploratory committee to make her comeback.

Byrne was elected to a single term in 1992, but was then defeated by Davis in the 1994 Republican landslide. In 2005, she was the unsuccessful Democratic nominee for lieutenant governor, and afterward became an early supporter of Jim Webb's Senate campaign.

If Davis vacates the seat for a Senate campaign, the seat could be an easy pick-up for Democrats. In the 2006 Senate election, Jim Webb carried the district by a ten-point margin.