A Democratic super PAC launched a preemptive attack against former senator Scott Brown (R-Mass.) Wednesday in the form of a TV ad that casts him as an ally of Wall Street.

"Now he's shopping for a Senate seat in New Hampshire. Really? That's good for Wall Street and great for Scott Brown. But t doesn't make sense for New Hampshire," says the narrator of the 30-second commercial from Senate Majority PAC.

Brown has been flirting with a New Hampshire Senate bid for months. He's appeared in the state regularly and has criticized Sen. Jeanne Shaheen (D-N.H.) indirectly.

Senate Majority PAC is spending $160,000 to air the ad over 10 days in New Hampshire. It's titled "#Bqhatevwr" — a reference to a perplexing tweet Brown dispatched last year. He later said it was a pocket tweet.

Republicans responded to the ad by suggesting it's a sign Democrats are worried about Shaheen's reelection prospects.

"This attack ad and Jeanne Shaheen's desperate attempt to find an excuse for her blind support for ObamaCare through her latest round of polling show how nervous she is about 2014," said New Hampshire Republican State Committee Chair Jennifer Horn.

Updated at 10:30 a.m.