May 18, 2010 1:00 pm Congressman Joe Sestak Votes Congressman Joe Sestak voted at a polling station in Gradyville, Delaware County, his home district. He is running against U.S. Senator Arlen Specter in the Democratic Primary. US & World Videos 22:22 WATCH: Pa. voters speak on Biden, Trump, abortion, economy, immigration, Israel-Hamas War and more 3:32 Biden on campus protests: ‘Order must prevail' 3:26 Mayor Parker addresses City Council to discuss the future of Philadelphia schools 2:04 Pro-Palestinian protests continue at University of Pennsylvania 1:42 Pro-Palestinian protesters set up camp at Penn