The real number of the US' obligations, unfunded obligations that we're passing on to our future generates is more like $70 trillion to $75 trillion. The vast majority of that is health entitlements - Medicare, Obamacare, Medicaid. There's also Social Security, interest on the debt. But fundamentally, health entitlements are the thing that will bankrupt our kids. We need to fix that for the long-term.

In the American constitutional system of three different branches, conflict - and I mean that peaceful, vigorous debate - it's a feature of our system, not a bug. We need less all-or - winner-take-all politics.

I don't understand what the president's [Donald Trump] position is on Russia. But I can tell you what my position is on Russia: Russia is a great danger to a lot of its neighbors, and [Vladimir] Putin has as one of his core objectives fracturing NATO, which is one of the greatest military alliances in the history of the world.

So [Vladimir] Putin is a mess. He's committed all sort of murderous thuggery, and I am opposed to the way Putin conducts himself in world affairs, and I hope that the president also wants to show moral leadership about this issue.

People think if they voted for somebody, they should reflexively defend everything they do or say. And if you voted against somebody, you should just as reflexively oppose everything they do or say. It's not very helpful. What's more constructive for our kids is to go on a case-by-case basis, evaluating particular policies.

What happens in Senate fight club stays in Senate fight club.

The president is the president. And every American, regardless of who you voted for, if you voted for Donald Trump, Hillary Clinton, Donald Duck, I don't really care. We should all hope that the president does a good job, that he's surrounded by wise counselors, that he advances U.S. interests.