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.

That is the story of our history - whether it's the pursuit of prosperity for our people or the struggle for equality for all of our citizens, our commitment to stand up for our values abroad, and our sacrifices to make the world a safer place. Let us remember that we can do these things not just because of wealth or power, but because of who we are. One nation under God, indivisible, with liberty and justice for all.

You may want to prove that you're worthy of other kids or neighbors who were wealthier than you and teased you. You may want to prove that you're worthy of high expectations. But I do think that there is a youthful ambition that very much has to do with making your mark in the world. And I think that cuts across the experiences of a lot of people who end up achieving something significant in their field.

I think we have two conflicting traditions in this country. I think it's important for us to recognize that we've got a tradition of handgun ownership and gun ownership generally. And a lot of people - law-abiding citizens use if for hunting, for sportsmanship, and for protecting their families. We also have a violence on the streets that is the result of illegal handgun usage. And so I think there is nothing wrong with a community saying we are going to take those illegal handguns off the streets.

The two inaugurations were different. The first inauguration I was thinking to myself, "Let's make sure I don't screw this up." I think there is - people always talk about how cool I am. I don't care how cool you are.

If we are enforcing what should be the rules around Medicare and making sure the people are getting the bang for the buck, it's not going to be possible for insurance companies to simply pass on those costs to Medicare recipients, because ultimately it's Uncle Sam that's paying for those services anyway.

The rise in health care costs since Obamacare, the Affordable Care Act was passed, have been at their lowest rate in 50 years. Those savings have extended the Medicare trust fund by 11 years. So we've got a baseline of facts.So it is true theoretically that all that progress can be undone, and suddenly 20 million people or more don't have health insurance.