The real estate mogul's victory gives him his third big win in the past two weeks. Texas Sen. Ted Cruz and Florida Sen. Marco Rubio finished far behind.
In any normal year, a Republican who wins big in New Hampshire and South Carolina would practically be seen as the presumptive nominee. So why isn't that happening this year?
Donald Trump will get 50 delegates from his Palmetto State win, but both Marco Rubio and Ted Cruz tried to spin their finishes as a victory as the field winnowed with Jeb Bush's withdrawal.
A superPAC supporting Ted Cruz is hitting Donald Trump in South Carolina for wanting the Confederate battle flag removed from the state capitol, something the state's Republican governor supported.
Donald Trump promised to bring thousands of jobs and tourism to Aberdeen. A decade later, he has angered the neighbors of his luxury golf course. "He promises the earth, delivers nothing," says one.
Ahead of this weekend's Republican primary in South Carolina, a campaign ad by Sen. Ted Cruz is trying to use Donald Trump's support of eminent domain against him.
Marco Rubio was the surprise beneficiary of heavy GOP turnout and made the fight for evangelicals a three-way contest. Bernie Sanders won with younger voters, but not enough voted for him to win.
Television debates have been a mainstay in presidential campaigns since 1976. Now, the GOP presidential front-runner is taking a big gamble just days before the Iowa caucuses.