Republican presidential candidate Donald Trump wins South Carolina's "first in the South" primary Saturday, and Democratic presidential candidate Hillary Clinton wins Nevada's caucuses.
Voters in South Carolina, Nevada Weigh In

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U.S. Republican presidential candidate Marco Rubio applauds as he approaches the podium to speak to supporters at a South Carolina primary night rally in Columbia, S.C., Feb. 20, 2016.

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Supporters of U.S. Republican presidential candidate Donald Trump celebrate the close of the polls as they watch election results at a rally in Spartanburg, S.C., Feb. 20, 2016.

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A voter arrives to cast his ballot in the U.S. Republican presidential primary at a polling place at Dreher High School in Columbia, S.C., Feb. 20, 2016.

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Gethsemani Community Center polling station employees tape voting notices predawn before the South Carolina Republican Presidential Primary voting commences at 7 a.m. in North Charleston, S.C., Feb. 20, 2016.