President Barack Obama salutes a Marines honor guard as he walks to a gathering of 2012-2013 NCAA Division I Men’s and Women’s championship teams from several sports on the South Lawn of the White House in Washington, Monday, March 10, 2014.(AP Photo/Manuel Balce Ceneta)
President Barack Obama waves to members of 2012-2013 NCAA Division I Men’s and Women’s championship teams from several sports on the South Lawn of the White House in Washington, Monday, March 10, 2014. (AP Photo/Manuel Balce Ceneta)
Athletes and officials representing various sports of the 2012-2013 NCAA Division I Men’s and Women’s Champions gather on the South Lawn of the White House in Washington, Monday, March 10, 2014 as they were honored by President Barack Obama. (AP Photo/Manuel Balce Ceneta)
President Barack Obama points to teams in the crowd as he speaks to members of 2012-2013 NCAA Division I Men’s and Women’s championship teams from several sports on the South Lawn of the White House in Washington, Monday, March 10, 2014. (AP Photo/Jacquelyn Martin)
** FILE ** In this Feb. 25, 2014, file photo, President Barack Obama speaks about manufacturing innovation institutes, in the East Room of the White House in Washington. (AP Photo/Jacquelyn Martin, File)
White House press secretary Jay Carney answers questions during his daily news briefing at the White House in Monday, March 10, 2014. Carney spoke about the ongoing situation in the Ukraine and this week's visit of Ukrainian Prime Minister Arseniy Yatsenyuk to the White House. (AP Photo/Pablo Martinez Monsivais)