Washington State Gov. Christine Gregoire (D) knows how to run against Republican Dino Rossi.

So when she was asked at a press conference Tuesday for advice for Sen. Patty Murray (D-Wash.), she made a quick suggestion: compare their records.

"What's he been doing since 2004? Where's he been? Talk about what she's done, talk about what he's done,” said Gregoire, who bested Rossi in gubernatorial contests in 2004 and 2008. "What has he done? He runs on 'I wrote a budget once.'"

Gregoire also defended the Democratic Senatorial Campaign Committee's early release of opposition research against Rossi, which she called "due diligence."

"I don't think it's any less fair than him holding … 12 candidates at bay. What has been the issue that has taken him so long to make up his mind?" she said, according to the Spokane Spokesman-Review.

Rossi is expected to announce his entrance into the race on Wednesday.

The two-term governor said she wasn't concerned about her fellow Democrat. "I'm not worried for Patty because Patty's never taken anything for granted in a race."