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
Vice President of Liberia the Vice President serves as president for the remainder of his or her predecessor's term, though this period is not considered a term for the purposes of term limits to the presidency. According to Article 63(a), should the president-elect die or become otherwise incapacitated before his or her inauguration, the Vice President-elect is sworn in as president in their place, though a term of this nature does constitute a term for the purposes of determining term limits. To date, five Vice Presidents have ascended to the presidency, either due to the president's death, resignation, or removal from office: James Skivring