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- In this November 2007 file photo, then presidential candidate Senator Barack Obama speaks during a campaign stop in Ottumwa, Iowa. (Reuters)
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- Former Senator Barack Obama speaks during a campaign stop in Maquoketa, Iowa (Reuters/Dec. 2007 file)
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- Barack Obama takes the Oath of Office as the 44th president of the United States with Chief Justice John Roberts and his wife, Michelle, on Jan. 20, 2009. (Reuters)
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- The president greets troops during an unannounced visit at Bagram Air Field in Afghanistan in Dec. 2010. (AP)
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- President Obama walks Bo, his 6-month-old Portuguese water dog, on the South Lawn at the White House in this April 2009 file photo.2009.
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- The president is sworn in for his second term at the White House on Jan. 20, 2013. (Reuters)
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- Obama embraces a woman while honoring the families of shooting victims in Hartford, Conn., on April 8, 2013. (AP)
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- Obama stands with Pope Francis during an arrival ceremony for the pontiff at the White House on Sept. 23, 2015. (Reuters)
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- Obama extends his hand to Russian President Vladimir Putin during their meeting at the UN General Assembly in New York on Sept.28, 2015. (Reuters)
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- India’s Prime Minister Narendra Modi (L) and President Obama watch India’s Republic Day parade behind rain- streaked bullet proof glass in New Delhi, India on Jan. 26, 2015.(Reuters)
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- The president addresses the nation from the Oval Office about ISIS and his strategy to defeat terrorism after the San Bernardino shootings on Dec. 6, 2016. (AP)
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- Obama answers questions from Arizona Sheriff Paul Babeu during a televised town hall meeting on gun violence in Fairfax, Va. on Jan. 7, 2016. (AP)
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- The Obama family watches the annual Christmas tree lighting ceremony at the Ellipse in Washington on Dec. 3, 2015. (AP)
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- Obama is shown leaving the East Room of the White House on Jan. 5, 2016. (AP)
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- The president works on his final State of the Union speech in the White House on Jan. 12, 2016. (Reuters)