Gary Johnson, the Libertarian presidential candidate, apparently does not know what Aleppo is.

Asked on Thursday's "Morning Joe" what he would do if elected president about the city in Syria at the center of the refugee crisis, Johnson earnestly asked: “What is Aleppo?”

"You're kidding me," responded Mike Barnicle, who had asked the question, and then began to explain what Aleppo is to the candidate.

"OK, got it, got it," Johnson said, cutting him off. He added: "With regard to Syria I do think it's a mess. mess. I think that the only way that we deal with Syria is to join hands with Russia to diplomatically bring that at an end."

"It's just a mess," he said.

Yes.

UPDATE: Following the "Morning Joe" interview, Johnson told Mark Halperin on camera that he's "incredibly frustrated with himself."

"No one is taking this more seriously than me, I feel horrible," the governor said. "I have to get smarter, and that's just part of the process."