White House press secretary Jay Carney during his daily news briefing at the White House in Washington, Monday, Aug. 20, 2012. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama walks across the South Lawn of the White House in Washington after his arrival from Camp David on Marine One helicopter, Sunday, Aug., 26, 2012. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama waves as he walks across the South Lawn of the White House after returning from Camp David on Marine One helicopter, Sunday, Aug., 26, 2012. (AP Photo/Pablo Martinez Monsivais)
Former astronauts (from left) Buzz Aldrin, Michael Collins and Neil Armstrong are pictured in the Oval Office at the White House in Washington on July 20, 2009, the 40th anniversary of the Apollo 11 moon landing. (AP Photo/Alex Brandon)
Rep. Jason Chaffetz, Utah Republican, plans to ask White House officials for more information on why the Labor Department spent a half-million dollars in federal stimulus money for more than 100 commercials that ran on MSNBC. (Associated Press)