President Barack Obama, first lady Michelle Obama, and Standing Rock Sioux Tribal Nation Chairman Dave Archambault II, left, and his wife Nicole Archambault, right, applaud as they watch a Cannon Ball flag day celebration, at the Cannon Ball powwow grounds in Cannon Ball, N.D., on June 13. Manuel Balce Ceneta/AP hide caption

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James Everett Dutschke, seen here as investigators searched his house last spring, was convicted of sending letters containing the poison ricin to President Obama and other officials. Rogelio V. Solis/AP hide caption

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President Obama prepares to sign an executive order mandating that federal contractors be required to raise the minimum wage they pay their workers to $10.10, at the end of a Jan. 29 appearance at the US Steel's Mon Valley Works in West Mifflin, Pa. Gene J. Puskar/AP hide caption

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Kentucky's Democratic governor, Steve Beshear, has gotten considerable attention for embracing President Obama's Affordable Care Act and adopting the Common Core educational standards. Roger Alford/AP hide caption

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President Obama shakes hands after giving the State of the Union address before a joint session of Congress on Tuesday. Larry Downing/AP hide caption

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Fox News Channel chief Roger Ailes attends a 2012 Hollywood Reporter celebration of "The 35 Most Powerful People in Media" in New York City. Stephen Lovekin/Getty Images hide caption

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President Obama walks off stage after speaking at the "SelectUSA Investment Summit" on Thursday. A poll released the same day found that the president's job approval rating had reached an all time low. Evan Vucci/AP hide caption

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Speaker of the House John Boehner leaves after discussing the government shutdown with his fellow Republicans on Capitol Hill Saturday. Boehner reportedly told his colleagues that talks with the White House had ended without a deal. Andrew Burton/Getty Images hide caption

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President Obama and House Speaker John Boehner sit together at a Capitol event in February dedicating a statue of civil rights icon Rosa Parks. J. Scott Applewhite/AP hide caption

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President Obama walks out to deliver remarks on the economy at the White House on Monday. At the beginning of his news conference, Obama commented on the shootings at the Navy Yard. Pablo Martinez Monsivais/AP hide caption

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Iran's President Hasan Rowhani, who was elected in June, has exchanged lettes with President Obama, the U.S. leader said in an interview that aired Sunday. Here, Rowhani speaks to Iran's Parliament in Tehran. Atta Kenare/AFP/Getty Images hide caption

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