Arlen Specter (February 12, 1930 – October 14, 2012) was an American lawyer, author, and politician who served as United States Senator for Pennsylvania. Specter was a Democrat from 1951 to 1965, then a Republican from 1965 until 2009, when he switched back to the Democratic Party. First elected in 1980, he represented Pennsylvania in the U.S. Senate for 30 years.
