(photo: Chip Somodevilla/Getty Images caption: U.S. President Barack Obama speaks during a news conference in the Brady Press Briefing Room of the White House on March 6, 2012 in Washington, DC. President Obama held his first news conference of the year on Super Tuesday as his Republican rivals battled for votes in 10 states.)
(photo: Garett Fisbeck for The New York Times caption: Andrew Lopez of Yukon, Okla., prayed with Rick Santorum during a rally at the Magnuson Hotel Convention Center in Oklahoma City on Feb. 9, two days after Mr. Santorum won the Colorado and Minnesota primaries.)
(photo: Brian Snyder/Reuters caption: A video screen displays archive images of Republican U.S. presidential candidate and former Massachusetts Governor Mitt Romney and his wife Ann at his “Super Tuesday” primary election night rally in Boston, March 6, 2012.
(photo: Kevin Lamarque/Reuters caption: Israeli Prime Minister Benjamin Netanyahu (C) meets with Senate Majority Leader Harry Reid (2nd L) and Senate Minority Leader Mitch McConnell (2nd R) at the U.S. Capitol in Washington March 6, 2012. Flanking the leaders are Sen. Bill Nelson (L) and Sen. Carl Levin (R).