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Mute point: Debate co-chair Fahrenkopf defends microphone-cutting decision in Trump-Biden debate

The president, who repeatedly interrupted during the first debate, called the move "very unfair."

A co-chair of the Commission on Presidential Debates defended the group's decision to mute microphones for parts of Thursday's debate, saying Tuesday that the organization is just trying to enforce rules the Trump and Biden campaigns have already agreed to.

The commission said Monday night that it would cut off Donald Trump's and Joe Biden's microphones while their opponent delivers initial two-minute answers on each topic at the debate in Nashville, Tennessee, a decision Trump told reporters he thought was "very unfair."

In an interview Tuesday on MSNBC, Frank Fahrenkopf, a co-chair of the commission, said the campaigns previously had agreed that their candidates would give their opponent two minutes of uninterrupted time to answer each of the initial six topic questions.

"Both parties agreed before the first debate and also agreed again before the second," Fahrenkopf told MSNBC's Ayman Mohyeldin.

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"If you watched the first debate, it's easy to see those rules were not followed, even though they'd agreed to," Fahrenkopf said, referring to last month's chaotic faceoff, which featured both candidates, but mostly Trump, interrupting and trying to talk over each other. A TV anchor described it as "a hot mess inside a dumpster fire inside a train wreck."

As for muting the microphones, Fahrenkopf said: "We didn't create a rule. We didn't touch the rules. All we did is put in a situation where if someone is interrupting, they won't be allowed to interrupt.

"Once they've completed their two minutes, then the microphones are on for the rest of the debate of that section," he said, adding that he hoped the free-form time will be "a little bit" with "a little more civility" than in the Cleveland debate.

Fahrenkopf also defended the debate's moderator, NBC News' Kristen Welker, whom Trump called "terrible" in an interview Tuesday morning on "Fox & Friends."

"I think it's unfair," Fahrenkopf said. "I think she's going to do a great job and a fair job."

He noted that Trump campaign adviser Jason Miller has previously called Welker "very fair in her approach" and a "very good choice" for the debate.