TAPPER: Mr. Trump, some of your Republican critics have expressed concern about comments you have made praising authoritarian dictators. You have said positive things about Putin as a leader, and about China's massacre of pro-democracy protesters at Tiananmen Square, you've said: "When the students poured into Tiananmen Square, the Chinese government almost blew it, then they were vicious, they were horrible, but they put it down with strength. That shows you the power of strength."

How do you respond?

TRUMP: That doesn't mean I was endorsing that. I was not endorsing it. I said that is a strong, powerful government that put it down with strength. And then they kept down the riot. It was a horrible thing. It doesn't mean at all I was endorsing it.