This morning I watched Stephen Colbert's interview of Joe Biden. As Michael Shear of The New York Times notes, Biden seems doubtful about running for president, although he seems to be trying to talk himself into it. Before the interview, I thought Biden was likely to run. Now I don't think so.

Vice President Joseph R. Biden Jr., in an emotional, wide-ranging interview on Stephen Colbert’s “Late Show” on Thursday, expressed doubt about the likelihood that he would run for president, saying that “I’d be lying if I said that I knew I was there.”

Repeatedly touching on his parents, his faith and his emotional fragility from the recent death of his son Beau, Mr. Biden told Mr. Colbert that no “man or woman should run for president” without being able to promise voters that “you have my whole heart, my whole soul, my energy, and my passion.”

“Nobody has a right, in my view, to seek that office unless they are willing to give it 110 percent of who they are,” Mr. Biden told Mr. Colbert....

“I find myself ... you understand, sometimes it just sort of overwhelms you. I can’t. ...,” he said, trailing off. Mr. Biden then told a story about how he broke down when he was greeting members of the military and their families at a rope line in Denver and one of them mentioned Beau.

“It was going great,” Mr. Biden recalled, choking up. “All of a sudden, a guy in the back yells, ‘Major Beau Biden. Bronze Star, Sir. Served with him in Iraq.’ I lost it.”

“How can you? That’s not .... You can’t do that,” he said.

That's in Part 2, below.