Sen. Specter switches from Republican to Democrat in Washington

Pennsylvania Sen. Arlen Specter (R) is greeted by Sen. Tom Harkin, D-IA, during a Senate Appropriations Labor, Health and Human Services, Education and Related Agencies Subcommittee hearing on the public health response to the Swine Flu on Capitol Hill in Washington on April 28, 2009. Specter announced today he is switching from Republican to Democrat. (UPI Photo/Roger L. Wollenberg)