Former Secretary of State Hillary Clinton, seen here at a U.N. event last March, has been criticized for using a private email account to conduct official business during her four years in the Obama administration. Andrew Burton/Getty Images hide caption

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Amtrak conductor Michael Laubauskas talks on a radio Feb. 19 as his train departs Trenton, N.J., for Washington, D.C. The U.S. House passed an Amtrak funding bill Wednesday that splits Amtrak's high-ridership Northeast Corridor line that runs from Boston to Washington from the less profitable part of the system. Mel Evans/AP hide caption

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Fans and foes of Obamacare jockeyed for position outside the Supreme Court Wednesday. Inside, the justices weighed arguments in the case of King v. Burwell, which challenges a key part of the federal health law. Pete Marovich/UPI/Landov hide caption

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President Obama arrives at the TransCanada Stillwater Pipe Yard in Cushing, Okla., in 2012 after renewed momentum in Congress to approve construction of the northern leg of the Keystone XL pipeline. Pablo Martinez Monsivais/AP hide caption

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Wilfredis Ayala, an unauthorized immigrant from El Salvador, lives on Long Island, N.Y., with his U.S.-born son, Justin, and Justin's mother, Wendy Urbina. Hansi Lo Wang/NPR hide caption

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The Clinton Foundation has taken contributions, of $1 million to $10 million, from the governments of Kuwait and the United Arab Emirates. The Saudi Arabian government has given as much as $25 million. Julie Jacobson/AP hide caption

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Supporters of the Affordable Care Act celebrate outside the Supreme Court in 2012, after a divided court upheld the law as constitutional by a 5-to-4 vote. The latest battle, which the Supreme Court hears Wednesday, is over whether people who buy insurance through federally run exchanges are eligible for subsidies. David Goldman/AP hide caption

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When lawyer Thomas Goldstein contended that innkeepers keep guest information anyway to stay in touch with their customers, Justice Scalia cut in: "Motel 6 does this? Jeez, I've never received anything from them!" iStockPhoto hide caption

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