Frustrated Kamala Harris clashes with CNN's Anderson Cooper after Biden's rough debate

Vice President Kamala Harris clashed with CNN's Anderson Cooper Thursday night after President Biden's widely panned debate performance, growing frustrated as he pointed out Democratic Party concerns with its standard-bearer.

Cooper recounted to Harris that even "some within your own party" thought Biden should potentially step aside from seeking the presidency, following a halting, raspy performance that alarmed liberal media and Democratic allies.

"What we saw tonight is the president making a very clear contrast with Donald Trump on all of the issues that matter to the American people," Harris said. "Yes, there was a slow start, but it was a strong finish."

As Harris defended Biden as strong on "policy and performance," Cooper interrupted to say it was highly disappointing to his supporters.

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"Democratic lawmakers watching the debate were worried about the performance. One said it was a disaster and another called it a trainwreck. Those are Democrats especially worried that Biden did not punch back on Trump‘s lies," Cooper said.

"People can debate on style points, but ultimately, this election and who is the president of the United States has to be about substance," Harris said, lambasting Trump as a liar and calling out his answers on January 6, accepting the election results, and abortion.

As Harris ripped into Trump, Cooper cut over her again, saying, "All that may be true, but the President of the United States was not able to make that case to Donald Trump on the stage tonight."

"You debated against then-Vice President Biden four years ago, and he was a very different person on the stage four years ago when you debated him. That‘s