Former Obama adviser David Axelrod said Saturday on CNN's “Newsroom Live” that there was a lot of “irrational exuberance” on the Democratic side of the aisle about Kamala Harris' candidacy.

Axelrod said: “His whole message for the past two years has been built around strength. He's strong. He's the guy who can deal with these issues and so on, and now he's got a younger opponent and quick to debate, and he doesn't want to debate. I don't know if it's a great aspect for him. I think at the end of the day, he may feel he has to debate.”

He continued: “I think there's a justified sense of concern in his camp that this thing could get away from him. It might be his race to lose, but it's a race so it could be lost, which they don't feel when they left that convention in Milwaukee.”