When our government is spoken of as some menacing, threatening foreign entity, it ignores the fact that, in our democracy, government is us. - Barack Obama

The President does not have power under the Constitution to unilaterally authorize a military attack in a situation that does not involve stopping an actual or imminent threat to the nation. In instances of self-defense, the President would be within his constitutional authority to act before advising Congress or seeking its consent. History has shown us time and again, however, that military action is most successful when it is authorized and supported by the Legislative branch. It is always preferable to have the informed consent of Congress prior to any military action. As for the specific question about bombing suspected nuclear sites, I recently introduced S.J.Res.23, which states in part that “any offensive military action taken by the United States against Iran must be explicitly authorized by Congress.”

I think that I've learned some lessons over the past four years, and the most important lesson I've learned is that you can't change Washington from the inside. You can only change it from the outside. That's how I got elected and that's how the big accomplishments like health care got done – was because we mobilized the American people to speak out. That's how we were able to cut taxes for middle class families. So, something that I'd really like to concentrate on in my second term is being in a much more constant conversation with the American people, so that they can put pressure on Congress to move some of these issues forward.

No one -- no one -- has given more for our freedom and our security than our Gold Star families. ... They represent the very best of our country. They continue to inspire us every day, every moment. They serve as a powerful reminder of the true strength of America. We have to do everything we can for those families, and honor them, and be humbled by them.