Who is Barack Obama? Contrary to the rumors you have heard, I was not born in a manger. I was actually born on Krypton and sent here by my father Jor-El to save the Planet Earth. Many of you know that I got my name, Barack, from my father. What you may not know is Barack is actually Swahili for 'That One.' And I got my middle name from somebody who obviously didn't think I'd ever run for president. If I had to name my greatest strength, I guess it would be my humility. Greatest weakness, it's possible that I'm a little too awesome.

We think about the enormous costs of homelessness, or the enormous cost of HIV/AIDS, over the long term, as people visit emergency rooms, etc. The more we are investing in that ounce of prevention the better off we're going to be.

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. As commander in chief, the president does have a duty to protect and defend the United States. In instances of self-defense, the president would be within his constitutional authority to act before advising Congress or seeking its consent.

Marco Rubio is one of those people. How does that work? How can you call him a con artist and dangerous, and object to all the controversial things he says, and then say, but I`m still going to vote for him? Come on, man.

I am very proud of the fact I do not cheat when I'm playing golf.

It [the Constitution] didn't break free from the essential constraints that were placed by the founding fathers in the Constitution, at least as it's been interpreted, and the Warren court interpreted it in the same way that generally the Constitution is a charter of negative liberties. It says what the states can't do to you, it says what the federal government can't do to you, but it doesn't say what the federal government or the state government must do on your behalf. And that hasn't shifted.

There are legitimate concerns and anxieties that the forces of globalisation are leaving too many people behind - and we have to take those concerns seriously and address them. But the answer isn't to turn inward and embrace protectionism. We can't just walk away from trade.