CNN's Anderson Cooper and Kamala Harris talk over each other in heated post-debate interview

Democratic lawmakers watching the debate were worried, worried about the president's performance. One said it was a disaster. Another called it a train wreck. Those are Democrats especially worried that Biden did not punch back on Trump's lies. Listen, people can debate on style points, but ultimately this election and who is the president of the United States has to be about substance, urgency, healthcare. To the point that but the president of the United States is not able to to put make that case to Donald Trump on the stage tonight. I mean, you debated against then Vice President Trump, excuse me, Vice President Biden four years ago. And he was a very different person on the stage four years ago when when you debated him. You must. I mean that that's certainly true, is it not? Anderson, the point has to be performance in terms of what a president does, a president who incites an insurrection against the capital. No, but I got the point that you're making about a 1 1/2 hour debate tonight. I'm talking about 3 1/2 years of performance in work that has been historic.