Republican Sen. Mike DeWine highlights bipartisanship in his latest campaign ad and challenges a Democrat who has voted no — rival Rep. Sherrod Brown.

"Working together is the only way to solve our problems," the Ohio senator says in his latest ad. The spot began airing Friday in seven of the state’s 11 largest media markets at a cost of about $600,000.

The 30-second ad features DeWine on a porch, talking about his bipartisan credentials. He mentions the pension overhaul bill, President Bush’s tax cuts and expanded federal powers for fighting terrorism.

"Incredibly, Congressman Brown voted ‘no’ each and every time," DeWine says, dropping his smile and taking a grave tone.

Brown spokeswoman Joanna Kuebler countered that Brown has worked with Republicans as the lead Democratic sponsor of several bills and top Democrat on a House subcommittee for health issues.

She also said DeWine shouldn’t have painted the tax cuts as bipartisan just because it got a few Democratic votes.

"For him to portray that as Democrats and Republicans working together is another example of Mike DeWine distorting the facts," she said. "Democrats fought and continue to fight those tax cuts for the rich."

In an interview after the ad was released, DeWine acknowledged the tax cuts didn’t have significant bipartisan support. "It’s true in one out of the three examples, but it still took Democrats to get it passed," he said.

Polls show a close race between the two-term incumbent and the seven-term congressman for the Senate seat.