Carly Mallenbaum

USA TODAY

The focus of the second presidential debate is, of course, on Donald Trump and Hillary Clinton. But they weren't the only ones in the spotlight Sunday night in St. Louis. Co-moderators Anderson Cooper and Martha Raddatz were responsible for keeping the candidates to their 2-minutes-per-question time limit, keeping outbursts to a minimum, letting undecided voters ask questions and asking their own follow-up questions in the town hall-style debate.

As Lester Holt knows, keeping all of that under control is no easy task. Here's what viewers on social media said about the CNN anchor and ABC News chief:

Many cheered for Cooper, who immediately brought up Trump's newly-released lewd comments from 2005.

Cooper called Trump's words about women "sexual assault." Trump just kept repeating that it was "locker room talk."

On the other hand, there were those on Twitter who thought Raddatz treated Trump unfairly.

She did, however, allow Trump to respond to Clinton's comments. Only after he asked.

Cooper interjected to stop Trump from speaking out of turn. Most of Twitter was here for it.

Meanwhile, Trump and some of his supporters complained that with the moderators, the debate was "one on three."

And then there was more Cooper and Trump back and forth.

Views on Cooper's role in the tête–à–tête were mixed.

Like her co-moderator, Raddatz was firm with Trump, asking him to stay on topic.

Trump was not happy, but many on Twitter were.

The second time he asked, Raddatz didn't allow Trump extra time.

"Mr. Trump, we're going to move on," Raddatz said, firmly, when Trump tried to reply to Clinton's comments. He listened. Then, she repeated her questions that she felt were left unanswered.

Overall, viewers had plenty of positive reviews for the moderators.

Many wanted Cooper and Raddatz to run for office, especially after Raddatz cut both candidates off with this almost-sarcastic line: "Thank you very much, both of you."