Mark Shields:

Yes.

In a strange way, I think that's a mistake and one of the few mistakes he's made. Americans do not want a Trump vs. Trump race. They don't want an insult race. I think one of the great appeals, sleeper appeals, of Pete Buttigieg in this entire campaign is that he lowers the emotional thermostat in the room, that he speaks reasonably.

Coming back to Michael Bloomberg, Judy, you're absolutely right. I have never seen anybody spend like this before. But his campaign has been totally controlled. He's never mixed it up. Now there's even some mention that he might not even go to the debates, where you get a sense of people and how you feel about them.

And Americans, in the final analysis, Michael worked with George W. Bush, of the last seven Republican nominees, the only one to win a popular majority of the vote in a presidential election in 2004.

Why did they vote for George W. Bush over John Kerry, who, I think, by most testaments, won the three debates between the two men? Because they prefer, I like over I.Q. They were more comfortable with George W.

There's no comfort level with Michael Bloomberg at this point. Nobody knows him. We don't know if he's got a temper, if he's got a sense of humor, if he's self-deprecating. Can he mix it up?

He's never mixed it up in a debate or in Iowa or New Hampshire. I think that's what we're going to have to find out. And if in a month from now, we're talking about his spending, rather than his ideas and how he's different and what he's going to do differently, we know where he is on climate change and gun control, then I think his campaign will be in trouble.