Republican Ted Cruz makes a campaign stop at the Bravo Cafe Monday in Osceola, Indiana. Indiana might be Cruz's last chance to stop Donald Trump from getting the nomination.
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Democratic presidential candidate Hillary Clinton talks with Bo Copley, who recently lost his job at a coal company, at a campaign roundtable in West Virginia on May 2, 2016.
Vice President Hubert Humphrey (right) and his running mate, Sen. Edmund S. Muskie, wave to the crowd with their wives at the Democratic Convention in Chicago on Aug. 29, 1968. Violence ensued inside and outside the convention hall.
A steel mill in Tangshan, in China's Hebei province. U.S. Steel claims that the Chinese government dumps steel at unfair prices and uses computer hackers to steal intellectual property.