Democratic presidential candidate Hillary Clinton greets supporters with her husband and former President Bill Clinton at a Las Vegas, Nevada, Democratic caucus rally on Saturday.
Republican presidential candidate Donald Trump speaks during a South Carolina Republican primary night event.
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., center, pauses for photos with hotel workers at MGM Grand hotel and casino Saturday in Las Vegas.The Associated Press
Republican presidential candidate, former Florida Gov. Jeb Bush speaks at his South Carolina Republican presidential primary rally in Columbia, S.C.
Republican presidential candidate Sen. Marco Rubio, R-Fla, and Gov. Nikki Haley wave to the crowd after speaking at an election-night rally in Columbia, S.C.
Republican presidential candidate Ohio Gov. John Kasich speaks during a campaign rally in Wakefield, Mass., Saturday.
Tommie Yanik of Ocean Springs, Miss., wears a campaign hat at the South Carolina primary night rally for Republican presidential candidate, Sen. Ted Cruz, R-Texas, at the South Carolina State Fairgrounds in Columbia, S.C.
Presidential preferences cards are held up as votes are counted during a Democratic caucus at the University of Nevada.
Supporters for Republican presidential candidate Donald Trump hold signs during a South Carolina Republican primary night event. in Spartanburg, S.C.
South Carolina voters arrive to vote in the Republican presidential primary Saturday at Mt. Horeb United Methodist Church in Lexington, S.C. The Associated Press
Voters wait in line for a polling place to open at Eastlan Baptist Church, Saturday in Greenville, S.C. The Associated Press
A woman listens to Democratic presidential candidate Hillary Clinton speak during a rally Friday in Las Vegas. The Associated Press
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., right, shakes hands with hotel workers at MGM Grand hotel and casino Saturday in Las Vegas. The Associated Press
Republican presidential candidate Donald Trump makes his way to the stage during a campaign stop Friday, Feb. 19, 2016, in North Charleston, S.C. The Associated Press
Democratic Presidential candidate Hillary Clinton takes a selfie with a supporter during a rally at the Clark County Government Center Friday, in Las Vegas. The Associated Press
Marco Rubio supporters shout to passing drivers in Columbia, S.C. Polling shows that close to 40 percent of South Carolina voters favor candidates who share their values.
A Bernie Sanders supporters holds a sign during a Democratic caucus at the University of Nevada in Reno.
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