'This Week' Transcript: Ted Cruz, Marco Rubio, and Donald Trump

— -- THIS IS A RUSH TRANSCRIPT FOR 'THIS WEEK' ON February 21, 2016 and it will be updated.

ABC THIS WEEK

(BEGIN VIDEO CLIP)

ANNOUNCER: Starting right now on ABC's THIS WEEK WITH George Stephanopoulos, Trump takes control -- the brash billionaire dominates in conservative South Carolina.

DONALD TRUMP (R), PRESIDENTIAL CANDIDATE: When you win, it's beautiful.

ANNOUNCER: His second straight win.

TRUMP: Let's put this thing away.

ANNOUNCER: Now, no doubt the outsider is the Republican frontrunner.

Can anyone stop him?

SEN. TED CRUZ (R-TX), PRESIDENTIAL CANDIDATE: South Carolina has given us another remarkable response.

SEN. MARCO RUBIO (R-FL), PRESIDENTIAL CANDIDATE: The son of a bartender and a maid from Cuba tonight stands one step closer to being the 45th president of the United States of America.

ANNOUNCER: Trump, Rubio, Cruz all here live.

And Hillary squeaks by.

HILLARY CLINTON (D), PRESIDENTIAL CANDIDATE: The fight goes on.

UNIDENTIFIED MALE: The Democratic race tighter than ever.

Plus, Apple goes to war -- inside the tech giant's refusal to help the FBI unlock a terrorist's iPhone. Apple's top lawyer joins us live.

From ABC News, it's THIS WEEK.

Here now, chief anchor, George Stephanopoulos.

(END VIDEO CLIP)

GEORGE STEPHANOPOULOS, ABC HOST: Good morning.

After crucial Saturday voters in this race for the White House, two candidates now in command. For the Democrats, Hillary Clinton found her farewell in Nevada. That win out West nearly 6 points over Bernie Sanders puts her back in control.

She heads into South Carolina and Super Tuesday with big leads in the biggest state.

And for the Republicans, it's all about Donald Trump. His double digit win over Marco Rubio and Ted Cruz in South Carolina, a possible delegate sweep, kills off the campaign of Jeb Bush, puts him in a powerful position. No Republican who's won both New Hampshire and South Carolina has ever lost the nomination.

The big question for so many in the GOP today, a question unimaginable one year ago, can Donald Trump be stopped?

He joins us live in a moment.

First, Jon Karl brings us all the results of the biggest day yet in this campaign -- good morning, Jon.

JONATHAN KARL, ABC NEWS CORRESPONDENT: Good morning, George.

This is a remarkable moment in American politics. What once seemed utterly impossible has now moved one step closer to reality. Hillary Clinton could be facing off against Donald Trump this fall for the presidency of the United States.

(BEGIN VIDEOTAPE)

KARL (voice-over): With his big win in South Carolina, Donald Trump took command.

TRUMP: There's nothing easy about running for president, I can tell you. It's tough, it's nasty, it's mean, it's vicious, it's beautiful. When you win, it's beautiful.

KARL: Trump's back-to-back victories in South Carolina and New Hampshire bode well for his chances on Super Tuesday, 11 states voting on March 1st.

TRUMP: Let's put this thing away and let's make America great again.

KARL: While Trump celebrated, Senator Marco Rubio narrowly edged out Ted Cruz for second place. Both seemed to declare victory, ready to take on Trump.

RUBIO: After tonight, this has become a three person race and we will win the nomination.

CRUZ: We are the only campaign that has beaten and can beat Donald Trump.

KARL: After betting big on a South Carolina comeback, Jeb Bush's distant fourth place finish ended his White House bid.