become a republican to run against his former boss, the then-district attorney of philadelphia, a democrat, in 1965. and angered a lot of people, including his former boss. but won the first bat until 1965 to become the only republican office holder in a democratic town. >> our chief foreign affairs correspondent, andrea mitchell who covered arlen specter for decades, thank you so much for joining us this afternoon we do appreciate your time. right now we bring in someone who knew senator spector from pennsylvania politics and former democratic congressman, joe sestak. >> nice to be with you. >> here's a man who supports a woman's right to choose, who voted to repeal don't ask don't tell. who also voted in support of the president's stimulus bill, which many say that sort of markeded end of his stint as a republican. will his legacy be his