Jill Biden: 'Joe would make a great president'

“Joe would make a great president, I always felt,” Jill Biden told NBC News's "Today" show. “I don't know whether this is his last campaign.”

It's not the first time Biden has suggested her husband could run for president. She made similar comments last December.

The vice president has said he is not ruling out the possibility of making a bid for the White House after Obama’s second term but is currently focused on the reelection campaign. He has unsuccessfully sought the Democratic nomination twice in the past.

“We're focusing on this campaign and winning this campaign,” Jill Biden said Tuesday. “I take one campaign at a time.”

Jill Biden stayed on script in her answer to the question, unlike her husband, who has been known to speak off-the-cuff on issues such as same-sex marriage. Biden recently apologized to the president for expressing his support for marriage equality ahead of the president’s planned endorsement. But Jill Biden said there are no hard feelings over the timing incident.

“Joe and Barack, they've worked this out. They're great. It's fine,” she said. “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 with politicians, and maybe that's what surprises them.”

Biden promoted her new book, Don't forget, God bless our troops, during the “Today” show appearance. Biden, together with first lady Michelle Obama, launched the Joining Forces initiative to support military families, and the book follows up on that cause.

Jill Biden also revealed that the vice president cried when he saw his daughter in her wedding gown during the private ceremony in Delaware last Saturday.