CBS host Margaret Brennan on Sunday slammed Democratic Gov. Wes Moore for trying to defend President Joe Biden as his party's nominee after his poor performance in the debate.

Governor Moore appeared on “Face the Nation” to say he was supporting Biden's campaign, despite calls from within his party to replace the candidate after the first presidential debate with former President Donald Trump. Governor Brennan began by questioning the governor about why Biden appeared to be struggling on Thursday night.

Moore argued that both candidates were struggling and drew a comparison between their debate performances and their presidential performances, but Brennan interjected, pointing out that Biden had not campaigned “as much as his surrogates”. (Related story: Family to discuss future Democratic nomination with Joe Biden at Camp David)

“But, with all due respect, Governor, the president doesn't give many interviews. He doesn't do anything that requires agility. The president is not here, but you are. He's not campaigning as frequently as your surrogates. I think that says something about there being a Democratic alternative that is younger, that can go out and be agile and campaign,” Brennan pressed.

“I've had the opportunity to watch the president through difficult times and through court cases and I've seen him be a great partner for us. Those are my memories, and that's why I continue to believe the Biden Administration is worthy of four more years, and I look forward to seeing what it can bring to the American people,” Moore responded.

“Why was the president having a hard time?” Brennan asked.

“I think the president has had a difficult night. I think we all have difficult nights,” Moore began.

“Why?” Brennan asked again.

“I think the president had a difficult night, just like all of us,” Moore said.

Brennan went further when Moore criticized Biden's response during the debate to issues like abortion and taxing billionaires, highlighting a moment when Biden froze mid-sentence and claimed, “Look, we won Medicare.”

“The president has missed his point,” Brennan said.

“Also, let's not forget that this is a binary election. This is a battle between President Joe Biden and, frankly, the debate over the national debt. You know, someone who's going to cut taxes at a time when we're going to see the greatest transfer of wealth in the history of the world over the next decade…” Moore responded.

“We need young voters to turn out. Democrats need young voters to turn out,” Brennan interjected.

“Exactly,” Moore replied.

“How do they feel seeing themselves reflected in that?” Brennan asked.

“They're going to see themselves reflected in all the people who go out representing the president. I think you have to go out and earn it. I'm the youngest Democratic governor in the country and the only African-American governor in America. We're always out there, working with other surrogates, working with the president and vice president on the campaign trail, getting in front of the public. We're making the case to the public why these partnerships are important. Progress doesn't happen by chance,” Moore said.

Moore later declined the option to run for the Democratic nomination on Biden's behalf, toughening his position after Brennan questioned whether the president was the party's only option.

Democratic pundits were quick to criticize Biden's performance after the debate, and just a day later, legacy media outlets called for him to step down. But despite concerns about the president's mental health, some say Biden isn't going anywhere.