David Axelrod actually said...

core to Joe Biden's appeal is that he was viewed as the Trump slayer and that he was the least risky choice.

He wants to stick to the text of his report. He doesn't want to go beyond it.

And the FBI director testified just this day that the Russians are still active and we have the President of the United States dismissing it...

He wants to elevate these four young members of Congress to make them the emblem of the Democratic Party.