N.Y. House candidate uses Giuliani nod in new TV ad

Staten Island Republican Michael Grimm is using an endorsement from Rudy Giuliani in his latest TV ad. The former New York City mayor says Grimm "knows first-hand the destruction caused by terrorists."

The ad comes on the heels of a TV spot released Michael Allegretti, Grimm's rival for the nod to face Rep. Mike McMahon (D-N.Y.). Allegretti's spot focused on the economy, and featured several shots of downtrodden-looking residents staring forlornly at the camera.

New York's primary is Sept. 14. Grimm is considered the frontrunner, having been backed by Giuliani and other high-profile Republicans such as Sarah Palin and Sen. John McCain (R-Ariz.).

Allegretti's spot was released last Friday.