Barack Obama

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**FILE** President Obama signs a presidential memorandum outlining the next steps for cleaner and more efficient vehicles on May 21, 2010, in the Rose Garden of the White House in Washington. From left: Transportation Secretary Ray LaHood, White House energy czar Carol Browner, EPA Administrator Lisa Jackson, Navistar Chief Executive Officer Daniel Ustian, Waste Management driver Anthony Dunkley and Daimler Trucks North America Chief Executive Officer Martin Daum. (Associated Press)

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President Barack Obama applauds new Supreme Court Justice Sonia Sotomayor at the start of a reception in the East Room of The White House in Washington, Wednesday, Aug. 12, 2009. (AP Photo/Alex Brandon)

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**FILE** In this photo from July 14, 2009, President Obama throws out the first pitch before the All-Star baseball game in St. Louis. (Associated Press)

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**FILE** President Obama delivers remarks in the Rose Garden of the White House on June 12, 2009. (Associated Press)

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** FILE ** President Obama reviews the honor guard with Afghan President Hamid Karzai (left) at the presidential palace in Kabul, Afghanistan, during Mr. Obama's unannounced visit on Sunday, March 28, 2010. (AP Photo/Charles Dharapak)

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**FILE** U.S. Ambassador David Jacobson shakes hands with Sister Constance Murphy before presenting a letter of congratulations from President Obama at the Convent of Sisters of St. John the Divine in Toronto on Dec. 4, 2009. (Associated Press)

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US President Barack Obama receives the Nobel Peace Prize during a ceremony in the Main Hall of Oslo City Hall in Oslo, Norway, Thursday, Dec. 10, 2009. (AP Photo/Susan Walsh)

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** FILE ** Democrats stand and Republicans sit as President Obama delivers his State of the Union address on Capitol Hill in Washington on Wednesday, Jan. 27, 2010. (AP Photo/Pablo Martinez Monsivais)

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**FILE** In this photo from April 2, 2009, President Obama meets with India's Prime Minister Manmohan Singh at the G-20 summit at the ExCel Centre in London. (Associated Press)

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** FILE ** President Obama meets with Afghan President Hamid Karzai at the presidential palace in Kabul, Afghanistan, on Sunday, March 28, 2010. (AP Photo/Charles Dharapak, File)

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Egyptian President Hosni Mubarak, left, greets U.S. President Barack Obama upon his arrival at Qubba palace in Cairo, Egypt, Thursday, June 4, 2009. President Obama is due to address the Muslim world in a speech during his visit to Egypt. (AP Photo/Amr Nabil)

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** FILE ** David Plouffe, who led President Barack Obama's winning campaign, stands in the 2008 presidential race, in Obama's Chicago campaign headquarters, May 10, 2007. (Associated Press)

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** FILE ** Marcelas Owens (foreground left) of Seattle, Rep. John Dingell (seated at right) and others look on as President Obama signs the heath care reform bill in the East Room of the White House in Washington on Tuesday, March 23, 2010. (AP Photo/J. Scott Applewhite)

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**FILE** In this July 28, 2009 file photo, a car turned in as a clunker sits in a recycle dumpster at Capitol City Buick Pontiac GMC in Berlin, Vt. The Obama administration will bring to an end the popular $3 billion Cash for Clunkers program on Monday giving car shoppers a few more days to take advantage of big government incentives. (Associated Press)

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This photo provided by the White House shows President Barack Obama discussing the START treaty, during a phone call with Russian President Dmitry Medvedev, Friday, March 26, 2010, in the Oval Office of the White House in Washington. (AP Photo/Pete Souza, White House )