President Barack Obama waves after being officially sworn-in by Chief Justice John Roberts in the Blue Room of the White House during the 57th Presidential Inauguration in Washington, Sunday, Jan. 20, 2013. Next to Obama are first lady Michelle Obama and daughters Malia and Sasha. (AP Photo/Charles Dharapak, Pool)
President Obama is officially sworn in by Chief Justice John G. Roberts Jr. in the Blue Room of the White House during the 57th Presidential Inauguration in Washington on Sunday, Jan. 20, 2013. (AP Photo/Brendan Smialowski, Pool)
President Obama is officially sworn in by Chief Justice John G. Roberts Jr. in the Blue Room of the White House during the 57th Presidential Inauguration in Washington on Sunday, Jan. 20, 2013. (AP Photo/Brendan Smialowski, Pool)
President Obama is officially sworn in by Chief Justice John G. Roberts Jr. (right) in the Blue Room of the White House in Washington on Sunday, Jan. 10, 2013. Next to Mr. Obama are first lady Michelle Obama, holding the Robinson family Bible, and daughters Malia and Sasha. (AP Photo/Larry Downing, Pool)
President Obama is officially sworn in by Chief Justice John G. Roberts Jr. (right) in the Blue Room of the White House in Washington on Sunday, Jan. 10, 2013. Next to Mr. Obama are first lady Michelle Obama, holding the Robinson family Bible, and daughters Malia and Sasha. (AP Photo/Larry Downing, Pool)
President-elect Barack Obama is sworn in as the 44th President of the United States by Chief Justice of the Supreme Court, John Roberts, at U.S. Capitol in Washington, D.C., Tuesday, January 20, 2009. (J.M. Eddins Jr. / The Washington Times)
Sitting on the U.S. Supreme Court are (clockwise from upper left) Associate Justices Sonia Sotomayor, Stephen G. Breyer, Samuel A. Alito Jr., Elena Kagan, Ruth Bader Ginsburg and Anthony M. Kennedy; Chief Justice John G. Roberts Jr.; and Associate Justices Antonin Scalia and Clarence Thomas. (AP Photo/Pablo Martinez Monsivais)
**FILE** This photo shows the justices of the U.S. Supreme Court in a group portrait at the Supreme Court Building in Washington on Oct. 8, 2010. Seated from left to right are: Associate Justice Clarence Thomas, Associate Justice Antonin Scalia, Chief Justice John G. Roberts, Associate Justice Anthony M. Kennedy, Associate Justice Ruth Bader Ginsburg. Standing, from left are: Associate Justice Sonia Sotomayor, Associate Justice Stephen Breyer, Associate Justice Samuel Alito Jr., and Associate Justice Elena Kagan. (Associated Press)
Sitting on the U.S. Supreme Court are (clockwise from upper left) Associate Justices Sonia Sotomayor, Stephen G. Breyer, Samuel A. Alito Jr., Elena Kagan, Ruth Bader Ginsburg and Anthony M. Kennedy; Chief Justice John G. Roberts Jr.; and Associate Justices Antonin Scalia and Clarence Thomas. (AP Photo/Pablo Martinez Monsivais)
