Greek Prime Minister Alexis Tsipras listens to Finance Minister Euclid Tsakalotos as Justice Minister Nikos Paraskevopoulos looks on during a parliamentary session in Athens on Thursday. Yiannakis Kourtoglou/Reuters/Landov hide caption

itoggle caption Yiannakis Kourtoglou/Reuters/Landov

Labor leaders, workers and activists attend a rally for a $15 minimum hourly wage Wednesday in New York City. A panel appointed by Gov. Andrew Cuomo recommended the increase. Spencer Platt/Getty Images hide caption

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Demonstrators rally before a meeting of a state wage board in New York. On Wednesday, a state panel recommended the minimum wage for fast-food employees be raised to $15 an hour, bypassing the state Legislature. Seth Wenig/AP hide caption

itoggle caption Seth Wenig/AP

Wisconsin Gov. Scott Walker frequently invokes his love of the Wisconsin-based discount retailer on the campaign trail as an example of how the government could bring in more revenue from lower taxes. Toby Talbot/AP hide caption

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Former Greek Finance Minister Yanis Varoufakis reacts during a parliamentary session in Athens, earlier this week. In an interview with the BBC, Varoufakis said reforms in exchange for new bailout money "will fail." Christian Hartmann/Reuters/Landov hide caption

itoggle caption Christian Hartmann/Reuters/Landov

Interior view of a room with a rotunda ceiling during an auction of slaves, artwork and goods. William Henry Brooke, 1772-1860/Courtesy of The Historic New Orleans Collection hide caption

itoggle caption William Henry Brooke, 1772-1860/Courtesy of The Historic New Orleans Collection