Supporters of Democratic presidential candidate Sen. Bernie Sanders cheer and hold up signs, including one of Sanders, during a campaign rally at Colorado State University Sunday.
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.
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Hillary Clinton, former secretary of state and 2016 Democratic presidential candidate, hugs Geneva Reed-Veal, the mother of Sandra Bland, during a campaign rally in Chicago.
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