When asked how America’s economy can grow while shutting out immigrant entrepreneurs, Carson evoked an example that involved a terrorist house party.

“We need to reorient our immigration policies and our visa policies for people who are coming into this country because there are many people out there who want to destroy us,” he said. “Now, I recognize that the vast majority of people coming in here probably are not those kinds of people, but that’s not good enough. If you’ve got 10 people coming to your house and you know one of them is a terrorist, you’re probably going to keep them all out.”

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In response to a hypothetical question about future Russian expansion into bordering countries, he made an attempt at timeless references to horses and sabers.

“We need to be doing military exercises in not only Estonia but Latvia and Lithuania. They’re terrified by the saber rattling,” Carson said. He went on: “I think we ought to give Ukraine offensive weapons and I think we ought to fight them on the economic basis because Putin is a one-horse country: oil. And energy,” he added, broadening Russia’s economic stable. (As ABC’s Rick Klein pointed out on Twitter: “1. Putin is not a country. 2. Putin’s country has more than one horse. 3. Oil and energy are more than one thing. 4. They are not horses.”)

And then as his final remarks as the debate ended, Carson recited the Preamble to the Constitution, nearly word for word.

His closing words: “Enough said.”

Enough said — indeed.