Hagel's vocal criticism of the Bush administration since the 2003 invasion of Iraq has touched off speculation that if Obama were to pick a Republican running mate, it might be Hagel. Hagel said in an interview with The Associated Press that after devoting much of his life to his country
- in the Senate and the U.S. Army - he would have to consider any offer.
"If it would occur, I would have to think about it," Hagel said. "I think anybody, anybody would have to consider it. Doesn't mean you'd do it, doesn't mean you'd accept it, could be too many gaps there, but you'd have to consider it, I mean, it's the only thing you could do. Why wouldn't you?"
In a book published this year, Hagel said that despite holding one of the Senate's strongest records of support for President Bush, his standing as a Republican has been called into question because of his opposition to what he deems "a reckless foreign policy ... that is divorced from a strategic context."
Hagel wrote in "America: Our Next Chapter" that the invasion of Iraq was "the triumph of the so-called neoconservative ideology, as well as Bush administration arrogance and incompetence."
He said Friday that he and Obama also have differences.
"But what this country is going to have to do is come together next year, and the next president is going to have to bring this country together to govern with some consensus," Hagel said.
He hasn't endorsed Sen. John McCain of Arizona, the presumed Republican nominee, whom he calls a friend. Hagel said Friday he hadn't thought about who to vote for in November.
In a March appearance on ABC's "This Week, he said he and McCain have "some pretty fundamental disagreements on the future of foreign policy," including the Iraq war.
McCain has said his goal is to reduce U.S. casualties, shift security missions to Iraqis and, ultimately, have a noncombat U.S. troop presence in Iraq similar to that in South Korea. He has said that such a presence could last 100 years or more.