Kean for McCain

Former New Jersey governor Thomas Kean, who headed the commission which investigated the Sept. 11 attacks, endorsed Arizona Sen. John McCain Monday for president, saying McCain would be the best leader to confront the ongoing terrorist threat.

Kean's endorsement adds to McCain's roster of foreign policy backers, which includes former Homeland Security chief Tom Ridge. It's also a blow to former New York mayor Rudy Giuliani, who has touted his leadership after 9-11 as a key reason he should be president.

"To the extent that we've been less vulnerable to attacks that we suffered on 9/11, it's in a large part due to the extraordinary leadership of John McCain," Kean told reporters in Boston.

--Michael D. Shear