U.S. Senator Joseph Biden of Delaware, a likely candidate for the 2008 Democratic presidential nomination, will be in New Jersey today to campaign for U.S. Senator Robert Menendez and for Assemblywoman Linda Stender, the Democratic candidate for Congress in the 7th district. U.S. Senator Barack Obama of Illinois will stump for Menendez on Thursday, attending events in Camden, Trenton and Newark. Thomas Ridge, who served as Governor of Pennsylvania before becoming the first Secretary of Homeland Security, was in New Jersey on Tuesday to raise money for Tom Kean, Jr.