"I'd say it's a reasonable question and that the White House ought to be conducting its own internal investigation of White House personnel who were in Cartagena, just to make sure that none of them were involved in this kind of inappropriate behavior," said Sen. Joe Lieberman, chairman of the Senate Homeland Security Committee. (Associated Press/CBS News)
** FILE ** White House press secretary Jay Carney gives his daily news briefing at the White House in Washington on Tuesday, April 17, 2012. (AP Photo/Carolyn Kaster)
President Obama speaks in the Rose Garden at the White House in Washington on Tuesday, April 17, 2012, about a plan to increase oversight of and crack down on manipulation in oil markets. (AP Photo/Carolyn Kaster)
This handout image provided by the White House shows the signature page of President Obama and first lady Michelle Obama's tax return. The White House says the president and his family paid more than $160,000 in federal taxes last year. (Associated Press/White House)
White House press secretary Jay Carney speaks during his daily news briefing at the White House in Washington on Thursday, April 12, 2012. (AP Photo/Carolyn Kaster)
President Roosevelt pins the Medal of Honor on Doolittle at the White House on May 19, 1942, as his wife, Josephine Daniels Doolittle, watches. The flier also was promoted to brigadier general. (Associated Press)
** FILE ** South Carolina Gov. Nikki Haley waits for President Obama to speak in the State Dining Room of the White House in Washington on Monday, Feb. 27, 2012. (AP Photo/Susan Walsh, File)
President Obama holds a basketball with his picture on it April 9, 2012, as he shakes hands with a member of the Harlem Globetrotters during the annual White House Easter Egg Roll. (Associated Press)
**FILE** President Obama plays basketball with former NBA player Bruce Bowen on April 9, 2012, during the annual White House Easter Egg Roll. (Associated Press)
White House press secretary Jay Carney tries to clear up what President Obama said about health care reform and the Supreme Court during his daily news briefing at the White House on Wednesday. "You're standing up there twisting yourself in knots," one reporter said to Mr. Carney. (Associated Press)