Republican Mark Kirk Sworn into US Senate

Republican Mark Kirk has become Illinois' newest U.S. senator.

Kirk was sworn in on Monday in the United States Senate Chambers by Vice President Joe Biden.

The five-term congressman from Chicago's north suburbs won the seat held once held by President Barack Obama.

Roland Burris was appointed to the seat by former Illinois Gov. Rod Blagojevich after the presidential election. Kirk will fill the remainder of Burris' term and a full six-year term. He narrowly won the seat against Democrat Alexi Giannoulias.

(Photo by Sean Powers/WILL)