Joe Biden
The 36-year Democratic senator from Delaware was picked as Barack Obama's running mate after his own short-lived presidential bid this year (he made a previous unsuccessful run in 1988).
Biden has had long service on the Senate Foreign Relations Committee, which he currently chairs, and his pick as Obama's running mate was seen as a move to shore up an Obama weakness- a lack of foreign policy experience.
Biden is often mocked as long-winded and made a notable gaffe on the campaign trail recently, telling Katie Couric that Franklin Roosevelt went on TV to reassure the public after the stock market crashed in 1929 - which was before FDR was president and before TV. But he also is viewed as knowledgeable and articulate.
Birthdate: November 20, 1942
Birthplace: Scranton, Pa.
Hometown: New Castle, Del.
Home: Wilmington, Del.
Family: Wife Jill Tracy Jacobs; 3 children living, 1 deceased
Religion: Catholic
Current job: U.S. Senator from Delaware, elected 1972
Employment history: Adjunct Professor, Widener University School of Law, 1991 - present; private practice attorney, 1968 -1972
Education: University of Delaware; J.D., Syracuse University College of Law
Website: www.barackobama.com