President Obama speaks in Dallas in 2013 about the technical problems that affected the initial rollout of the Affordable Care Act. Now, citing the law's success, he is urging Congress to expand the insurance offerings. Brendan Smialowski/AFP/Getty Images hide caption

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President Obama and Hillary Clinton walk off Air Force One in Charlotte, N.C., to attend a Clinton campaign event. The costs of that flight will be repaid by the Democratic National Committee. Nicholas Kamm/AFP/Getty Images hide caption

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President Obama (L) and former Secretary of State Hillary Clinton (R) both responded to Donald Trump's comments on terrorism and gun control on Tuesday. (L) Saul Loeb/AFP/Getty Images and (R) Jeff Swensen/Getty Images) hide caption

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Hillary Clinton smiles at the crowd at the start of her remarks during a primary night rally Brooklyn, N.Y. Drew Angerer/Getty Images hide caption

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Hillary Clinton Speaks To NPR About President Obama's Endorsement

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David Padilla with his daughter Sasha after being released a halfway house. This was his last step to returning home after nearly two decades in federal prison. Isaac Turner for NPR hide caption

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'It's Just The Beginning Now,' Says Man Freed From Serving 2 Life Sentences

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President Obama shakes hands with Saudi King Salman bin Abdulaziz Al Saud following a meeting in November at the G20 summit in Antalya, Turkey. Saul Loeb/AFP/Getty Images hide caption

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Plenty Of Friction Expected During Obama's Visit To Saudi Arabia

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A video depicts an imagined Donald Trump presidency, as President Barack Obama delivers jokes — with Trump in the audience — at the 2011 White House Correspondents dinner. Manuel Balce Ceneta/AP hide caption

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#NeverTrump Efforts Could Take Tips From 2011 Correspondents Dinner

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