David Axelrod: “He has to be close enough so that this still looks like a horse race.”

The place where it has influenced politics is in Canada. Now, Justin Trudeau is not -- he's stepping down. He's going to step down. But there's going to be an election in the next few days for the new Liberal Party leader and then there…

The nature of presidential politics is the bar gets raised constantly.

Unless the economy and his numbers rebound, Republicans are going to feel less willing to follow him blindly.

I think the darker interpretation of what we saw today is that they were setting up a pretext, he and the vice president for walking away from Ukraine and blaming Zelenskyy for it.