We know what happens when Europeans start dividing themselves up and emphasizing their differences and seeing a competition between various countries in a zero sum way.

We were still able to see the phone records of a potential terrorist cause, we held them, now you have to hope the phone company still has them, you have to argue with their chief counsel by the time you get access to it, and try to find out who they've been talking to before it's too late.

To the extent that our political dialogue is such where everything is under suspicion, everybody is corrupt and everybody is doing things for partisan reasons, and all of our institutions are full of malevolent actors - if that's the storyline that's being put out there by whatever party is out of power, then when a foreign government introduces that same argument with facts that are made up, voters who have been listening to that stuff for years, who have been getting that stuff every day from talk radio or other venues, they're going to believe it.

When you're a candidate and you say something that is inaccurate or controversial, it has less impact than it does when you're president of the United States. Everybody around the world's paying attention. Markets move. National security issues require a level of precision in order to make sure that you don't make mistakes.

It's the idea held by generations of citizens who believed that America is a constant work in progress; who believed that loving this country requires more than singing its praises or avoiding uncomfortable truths. It requires the occasional disruption, the willingness to speak out for what's right, and shake up the status quo.

Rather than pointing fingers or assigning blame, let’s use this occasion to expand our moral imaginations, to listen to each other more carefully, to sharpen our instincts for empathy and remind ourselves of all the ways that our hopes and dreams are bound together.

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.