Vice President Joe Biden at right administers the oath of office to Senator Mark Kirk (R-ILL) at left on Nov. 29, 2010 to fill a seat in the Senate caused by the decision of Sen. Rolland Burris (D-ILL) not to seek election to another term against the backdrop of a Senate ethics committee investigation and allegations of perjury to committees of the state legislature investigating the circumstances of his appointment by the governor. Burris was appointed by Gov. Rod Blagojevich (D-ILL) to fill the seat left vacant by the election of Sen. Barack Obama to the office of President in 2008. Blogojevich was impeached and convicted by the State Senate for official misconduct in 2009 and was replaced by Lt. Gov. Pat Quinn. Sen. Kirk started a full six-year term in January 2011 but missed many months in 2012 due to hospitalization for a stroke. Kirk had previously served in the House and was elected to two concurrent terms in November 2010 for both the vacant seat and a full term. Sen. Kirk returned to his duties in the Senate in early 2013 after a year off for physical therapy and rehab treatments.