Former Boston mayor Ray Flynn, a Democrat, has cut a 30-second advertisement for Republican senator Scott Brown. "I'm a Democrat, but I'm tired of all the polarization and the pettiness and the bickering," says Flynn. "Scott Brown is a person that you can work with." Watch the ad below:

Flynn, who was mayor from 1984 to 1993 and served as U.S. ambassador to the Holy See under President Bill Clinton, is a Roman Catholic and is staunchly pro-life. Brown received Flynn's endorsement during his special election campaign in 2010.

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