While appearing on NBC's "The Today Show" to promote her new book on military families on Tuesday, Dr. Jill Biden also spoke about her husband, Vice President Joe Biden, and his political future.

"I don’t know whether this is his last campaign," she said. "We’re focusing on this campaign and winning this campaign. I take one campaign at a time."

"Joe would make a great president," she said. "Last time when he ran, I supported him. I wanted us out of Iraq and I felt that Joe would do that, but Barack did it, so everything has worked out."

Though President Barack Obama said Biden "probably got out a little bit over his skis" in saying on "Meet the Press" that he is "absolutely comfortable" with gay marriage before the president announced his shift, Dr. Biden sounded a conciliatory note. "Joe and Barack, they worked this out," she said. "It’s fine. Joe speaks from the heart, and that's what he did. That’s what I love about him. I know a lot of people aren't used to that in politicians, and that’s what surprises them."

Dr. Biden also said that her husband cried at the wedding of their daughter, Ashley, Saturday in Delaware.

"He was a little emotional," she said.