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.
Democratic presidential candidate Hillary Clinton greets supporters with her husband, former President Bill Clinton, at a Nevada Democratic caucus rally in Las Vegas, Feb. 20, 2016.
Republican U.S. presidential candidate Donald Trump, center, greets supports at a victory rally in Spartanburg, S.C., Feb. 20, 2016. On stage with Trump are his daughter, Ivanka, left, and his wife, Melania, right.
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., waves to voters as he leaves a caucus site, in Las Vegas, Feb. 20, 2016.
Republican presidential candidate, former Florida Gov. Jeb Bush accompanied by his wife, Columba, son Jeb Bush Jr., left, and Sen. Lindsey Graham, R-S.C., speaks in Columbia, S.C., Feb. 20, 2016.