Walter Mondale, the 1984 Democratic presidential nominee, pumps his fist during his acceptance speech at the Democratic National Convention in San Francisco. Anonymous/AP hide caption

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Donald Trump greets supporters after speaking at a caucus night watch party at the Treasure Island Hotel & Casino in Las Vegas. Trump is favored to do well Super Tuesday. Ethan Miller/Getty Images hide caption

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Democratic presidential candidate Hillary Clinton and her husband, former President Bill Clinton, speak at a "Get Out The Vote Rally" in Columbia, S.C., on Friday. Gerald Herbert/AP hide caption

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A voter marks a ballot during the New Hampshire primary. So far just a small percentage of votes have been cast. But that changes after Super Tuesday. David Goldman/AP hide caption

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NPR's Politics Podcast Explains Super Tuesday
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Former Massachusetts Gov. Mitt Romney addressed supporters at a Super Tuesday rally in Boston on Tuesday. His home state was one of the six he won Tuesday night. Jessica Rinaldi /Reuters /Landov hide caption

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Ten states hold GOP nominating contests on March 6. Here a voter heads to a polling station Tuesday morning in Cambridge, Mass., where former Gov. Mitt Romney is expected to win his home state. Emmanuel Dunand /AFP/Getty Images hide caption

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Last week's Junkie segment on TOTN
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