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
Barack Obama 2012 presidential campaign twice. On January 20, 2009, Barack Obama was inaugurated as the 44th President of the United States. On April 4, 2011, President Obama officially announced his candidacy for re-election. The announcement was made via an online video titled "It Begins With Us", posted on his campaign website. The President also filled out official forms with the FEC at that time. President Obama did not face a significant challenge in the Democratic primaries, with no other candidate on the ballot in all but seven states. On April 3, 2012, Obama won the Maryland and District of Columbia primaries, giving him more