Reporter: There's no question that international travel can be rigorous. I think the confusion is that he's still suffering from the effects of that nearly two weeks later. Do you guys usually have accommodations for him after he does a trip, that he's gonna have jet lag for that long a period of time?

Jean-Pierre: When you say two weeks later, what do you mean?

Reporter: He arrives back in the United States twelve or thirteen days before the debate. So his explanation for a poor debate performance is jet lag?

Jean-Pierre: So what I want to say, it's, it's the jet lag, and also the cold. It is the two things that occurred.

Reporter: [Biden] said, "he's the only president, this century, this decade, that doesn't have any troops dying anywhere in the world like he did". I get having a bad night, but how can [Biden] get that so wrong?

Jean-Pierre: [Biden] was making a comparison between how many servicemembers have died under his leadership, versus in previous years. That's what the comparison that he was making. He was doing that because he cares so deeply, cares so deeply, about them and their families.