From the debate transcript in Fortune:

RADDATZ: Mr. Trump, we’re going to move on. The heart-breaking video of a 5-year-old Syrian boy named Omran sitting in an ambulance after being pulled from the rubble after an air strike in Aleppo focused the world’s attention on the horrors of the war in Syria, with 136 million views on Facebook alone.

But there are much worse images coming out of Aleppo every day now, where in the past few weeks alone, 400 people have been killed, at least 100 of them children. Just days ago, the State Department called for a war crimes investigation of the Syrian regime of Bashar al-Assad and its ally, Russia, for their bombardment of Aleppo.

So this next question comes through social media through Facebook. Diane from Pennsylvania asks, if you were president, what would you do about Syria and the humanitarian crisis in Aleppo? Isn’t it a lot like the Holocaust when the U.S. waited too long before we helped? Secretary Clinton, we will begin with your two minutes.

CLINTON: Well, the situation in Syria is catastrophic. And every day that goes by, we see the results of the regime by Assad in partnership with the Iranians on the ground, the Russians in the air, bombarding places, in particular Aleppo, where there are hundreds of thousands of people, probably about 250,000 still left. And there is a determined effort by the Russian air force to destroy Aleppo in order to eliminate the last of the Syrian rebels who are really holding out against the Assad regime.

Russia hasn’t paid any attention to ISIS. They’re interested in keeping Assad in power. So I, when I was secretary of state, advocated and I advocate today a no-fly zone and safe zones. …

But I want to emphasize that what is at stake here is the ambitions and the aggressiveness of Russia. Russia has decided that it’s all in, in Syria. And they’ve also decided who they want to see become president of the United States, too, and it’s not me. I’ve stood up to Russia. I’ve taken on Putin and others, and I would do that as president.

… But I do support the effort to investigate for crimes, war crimes committed by the Syrians and the Russians and try to hold them accountable.

TRUMP: …

… Now, she talks tough, she talks really tough against Putin and against Assad. She talks in favor of the rebels. She doesn’t even know who the rebels are. You know, every time we take rebels, whether it’s in Iraq or anywhere else, we’re arming people. And you know what happens? They end up being worse than the people.

Look at what she did in Libya with Gadhafi. Gadhafi’s out. It’s a mess. And, by the way, ISIS has a good chunk of their oil. …

But look at that deal. Iran now and Russia are now against us. So she wants to fight. She wants to fight for rebels. There’s only one problem. You don’t even know who the rebels are. So what’s the purpose?

… I don’t like Assad at all, but Assad is killing ISIS. Russia is killing ISIS. And Iran is killing ISIS. And those three have now lined up because of our weak foreign policy.

RADDATZ: Mr. Trump, let me repeat the question. If you were president…

(LAUGHTER)

… what would you do about Syria and the humanitarian crisis in Aleppo? And I want to remind you what your running mate said. He said provocations by Russia need to be met with American strength and that if Russia continues to be involved in air strikes along with the Syrian government forces of Assad, the United States of America should be prepared to use military force to strike the military targets of the Assad regime.

TRUMP: OK. He and I haven’t spoken, and I disagree. I disagree.

RADDATZ: You disagree with your running mate?

TRUMP: I think you have to knock out ISIS. Right now, Syria is fighting ISIS. We have people that want to fight both at the same time. …

I believe we have to get ISIS. We have to worry about ISIS before we can get too much more involved.