Ten leading Republican presidential candidates faced off in the first debate of the 2016 presidential election Thursday night. The main topics of the prime-time debate included immigration, abortion, the self-proclaimed Islamic State and the U.S. healthcare system. During the debate, front-runner Donald Trump stood by earlier statements that the Mexican government was sending the “bad ones over.”

Donald Trump: “People that I deal with, that I talk to, they say this is what’s happening, because our leaders are stupid, our politicians are stupid. And the Mexican government is much smarter, much sharper, much more cunning. And they send the bad ones over because they don’t want to pay for them. They don’t want to take care of them. Why should they, when the stupid leaders of the United States will do it for them? And that’s what’s happening, whether you like it or not.”

Debate moderator Megyn Kelly asked Donald Trump about his comments calling women “fat pigs,” “dogs,” “slobs” and “disgusting animals.” You’ll hear his response later in the broadcast. Meanwhile, New Jersey Governor Chris Christie and Kentucky Senator Rand Paul got into a heated argument over NSA domestic surveillance.

Sen. Rand Paul: “And I’m proud of standing for the Bill of Rights, and I will continue to stand for the Bill of Rights.”

Gov. Chris Christie: “And — and, Megyn? Megyn, that’s a — that, you know, that’s a completely ridiculous answer: 'I want to collect more records from terrorists, but less records from other people.' How are you supposed to know, Megyn?”

Sen. Paul: “Use the Fourth Amendment!”

Gov. Chris Christie: “What are you supposed to…”

Sen. Paul: “Use the Fourth Amendment!”

Gov. Chris Christie: “How are you supposed to — no, I’ll tell you how you…”

Sen. Paul: “Get a warrant!”

Gov. Chris Christie: “Look, let me tell you something. You go…”

Sen. Paul: “Get a judge to sign the warrant.”

Some analysts described Thursday’s debate as the Roger Ailes primary since the head of Fox News had so much say about who participated in the prime-time event. Seven other Republican presidential candidates who didn’t make the cut participated in another debate earlier in the evening. Fox News said it calculated its top 10 list by averaging five national polls, a process which came under fire from polling agencies earlier this week. We’ll have more on the Republican debate later in the broadcast.