Former Special Counsel Robert Mueller, in exchange with Republican Rep. Ken Buck, again said a president can be charged with obstruction of justice after they have left office.

Here's the exchange:

Buck: "Could you charge the President with a crime after he left office?"

Mueller: "Yes."

Buck: "You believe that he committed — you could charge the President of the United States with obstruction of justice after he left office?"

Mueller: "Yes."

Buck: "Ethically? Under the ethical standards?"

Mueller: "I'm not certain because I haven't looked at the ethics standards but the OLC opinion says that the prosecutor, while he cannot bring a charge against a sitting president, nonetheless he can continue the investigation to see if there are other persons drawn into the conspiracy."

This isn't the first time Mueller has said this today. Earlier, while answering questions from committee chair Jerry Nadler, Mueller citied Justice Department rules that he could not prosecute a sitting president — and then suggested that it's possible Trump can be charged after leaving the White House.

Mueller did not, however, say if Trump should be charged.