Presidential transition of Barack Obama time of their election, President-elect Obama and Vice President-elect Joseph Biden were incumbent U.S. Senators from Illinois and Delaware respectively. In accordance with Article I, Section 6 of the United States Constitution, both were required to resign their respective Senate seats on or before January 20, 2009, in order to become President and Vice President. Obama resigned from the Senate effective November 16, 2008. Initially, it was thought that his replacement would be named by Illinois Governor Rod Blagojevich. Since the term for the seat expired in January 2011, it would come up for its normal election in 2010 with
Oath of office of the Vice President of the United States the vice president (who serves as the president of the Senate). Later that year, legislation passed that allowed courts to administer all oaths and affirmations. Since 1789, the oath has been changed several times by Congress. The present oath repeated by the vice president, senators, representatives, and other government officers has been in use since 1884. When the vice presidency was established in 1789, and for the century that followed, the Vice President was sworn in on the same date as the president, March 4, but at a separate location, typically in the United States Senate, where he holds the