U.S. President Barack Obama uses a magnifying glass to play a game with children in a pre-kindergarten classroom at College Heights early childhood learning center in Decatur February 14, 2013. Obama flew to Georgia to push his plan to ensure high-quality preschool, unveiled during his State of the Union address this week.  REUTERS/Jason Reed   (UNITED STATES - Tags: POLITICS EDUCATION TPX IMAGES OF THE DAY)
RM2CWW6YEU.S. President Barack Obama uses a magnifying glass to play a game with children in a pre-kindergarten classroom at College Heights early childhood learning center in Decatur February 14, 2013. Obama flew to Georgia to push his plan to ensure high-quality preschool, unveiled during his State of the Union address this week. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS EDUCATION TPX IMAGES OF THE DAY)
Dora Romero, 31, of Washington, DC cleans the display window at the Newseum in Washington on January 20, 2009,  where front pages are displayed from yesterday's papers. Barack Obama is sworn in as the 44th President of the United States today.   (UPI Photo/Arianne Teeple)
RMTXEWC1Dora Romero, 31, of Washington, DC cleans the display window at the Newseum in Washington on January 20, 2009, where front pages are displayed from yesterday's papers. Barack Obama is sworn in as the 44th President of the United States today. (UPI Photo/Arianne Teeple)
Workmen hang a sign welcoming U.S. President-elect Barack Obama at the Newseum in Washington, January 10, 2009. The U.S. Presidential inauguration ceremony at the U.S. Capitol will be held on January 20.    REUTERS/Chris Kleponis  (UNITED STATES)
RM2D2MYCDWorkmen hang a sign welcoming U.S. President-elect Barack Obama at the Newseum in Washington, January 10, 2009. The U.S. Presidential inauguration ceremony at the U.S. Capitol will be held on January 20. REUTERS/Chris Kleponis (UNITED STATES)
President of the United States Barack Obama speaks at the Foreign Office in London
RMGBN6PHPresident of the United States Barack Obama speaks at the Foreign Office in London
People look at newspaper front pages from around the world telling of the election victory of President-elect Senator Barack Obama at the Newseum in Washington November 5, 2008.     REUTERS/Kevin Lamarque   (UNITED STATES)    US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA
RM2D213PMPeople look at newspaper front pages from around the world telling of the election victory of President-elect Senator Barack Obama at the Newseum in Washington November 5, 2008. REUTERS/Kevin Lamarque (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA
Dora Romero, 31, of Washington, DC cleans the display window at the Newseum in Washington on January 20, 2009, where front pages are displayed from yesterday's papers. Barack Obama is sworn in as the 44th President of the United States today.   (UPI Photo/Arianne Teeple)
RMTXEWC0Dora Romero, 31, of Washington, DC cleans the display window at the Newseum in Washington on January 20, 2009, where front pages are displayed from yesterday's papers. Barack Obama is sworn in as the 44th President of the United States today. (UPI Photo/Arianne Teeple)
Nora Sherman, 18 months old, and her father Paul Sherman of Washington view the front pages of Wednesday's newspapers from around the world on display outside the Newseum in Washington November 5, 2008. Americans woke with joy, cautious optimism and frank worry on Wednesday after the historic win by Democrat Barack Obama, who went from long shot to president-elect on the promise of change.   REUTERS/Molly Riley   (UNITED STATES)
RM2D1G740Nora Sherman, 18 months old, and her father Paul Sherman of Washington view the front pages of Wednesday's newspapers from around the world on display outside the Newseum in Washington November 5, 2008. Americans woke with joy, cautious optimism and frank worry on Wednesday after the historic win by Democrat Barack Obama, who went from long shot to president-elect on the promise of change. REUTERS/Molly Riley (UNITED STATES)
BARACK OBAMA as 44th President of the United States about 2012. Photo: White House
RMTX96KMBARACK OBAMA as 44th President of the United States about 2012. Photo: White House
U.S. President Barack Obama speaks from the stage at a political fund-raiser in Austin, Texas.
RMC3HKWGU.S. President Barack Obama speaks from the stage at a political fund-raiser in Austin, Texas.
Photograph of Barack Obama speaking at the 2009 G20 London Summit. Barack Hussein Obama II (1961-) an American attorney and served as the 44th President of the United States.
RM2CWBHAGPhotograph of Barack Obama speaking at the 2009 G20 London Summit. Barack Hussein Obama II (1961-) an American attorney and served as the 44th President of the United States.
President Barack Obama, 44th President of the United States
RME28KDDPresident Barack Obama, 44th President of the United States
united states US president barack obama visit EU
RMDXHE6Nunited states US president barack obama visit EU
Visitors look at a painting of President Barack Obama by artist Kehinde Wiley at the National Portrait Gallery in Washington, D.C.
RMW20FWTVisitors look at a painting of President Barack Obama by artist Kehinde Wiley at the National Portrait Gallery in Washington, D.C.