The pro-Republican group Crossroads GPS continues to pump money into Virginia, unveiling a new ad Wednesday hitting former governor Timothy M. Kaine. The ad is part of a $2.6 million buy also aimed at Democratic Senate candidates in Nevada and Nebraska.

One day after the matchup was formalized between Kaine (D) and George Allen (R) for the seat of retiring Sen. James Webb (D), Crossroads released a spot accusing the Democrat of “leaving Virginia behind” and “putting partisan ambition first” when he became Democratic National Committee chairman.

Democrats scoff at the attacks on Kaine as a Beltway insider, given that Allen previously served as National Republican Senatorial Committee chairman and later ran an Alexandria-based public policy firm.

“Another day, another false attack ad by Karl Rove to help bail out George Allen’s campaign.,” said Kaine spokeswoman Brandi Hoffine. “Both Tim Kaine and George Allen have served in party leadership posts, but there’s a big difference. As governor, Tim Kaine put partisanship aside, and worked together with Republicans to find common ground. … As senator, George Allen toed the party line, turning a record surplus into a massive deficit, voting against pay-as-you-go legislation and supporting the policies that led to near economic collapse.”