Trump says he doesn't know who Proud Boys are after telling them to "stand by"

President Trump told reporters on Wednesday that he doesn't know who the Proud Boys are, after saying at the presidential debate last night that the far-right group should "stand back and stand by" in response to a question asking him to condemn white supremacists.

Why it matters: The comments set off outrage and calls for clarification from a number of Republican senators. After being asked several times on Wednesday whether he will condemn white supremacy, Trump responded, "I have always denounced any form — any form of any of that, you have to denounce. But I also — Joe Biden has to say something about antifa."

The exchange:

TRUMP: "I don't know who the Proud Boys are. You'll have to give me a definition because I really don't know who they are. I can only say they have to stand down and let law enforcement do their work. ... As people see how bad this radical liberal Democrat movement is and how weak, the law enforcement is going to come back stronger and stronger. But again, I don't know who Proud Boys are, but whoever they are, they have to stand down and let law enforcement do their work.

REPORTER: "Mr. President, during the speech when you said 'stand by,' that might be [inaudible]"

TRUMP: "Just stand by. Look, law enforcement will do their work. They're going to stand down, they have to stand down. Everybody. Whatever group you are talking about, let law enforcement do the work. Now, antifa is a real problem. Because the problem is on the left. And Biden refuses to talk about it."

Go deeper: Biden condemns Proud Boys, calls Trump's debate performance a "national embarrassment"