To question the legitimacy of the next United States president, you know, and you're worried about a tweet that says, hey, why don't you get back to work instead of questioning my legitimacy? Too bad.

We all remember that [Donald] Trump was one of the leaders of the so-called birther movement trying to delegitimize the presidency of our first African-American president Barack Obama, which is an outrage.

The vast majority of the American people agree with me and many others. You don't simply repeal the Affordable Care Act without a replacement. Republicans have had six years to come up with a replacement. They got nothing.

You cannot be afraid to speak up and speak out for what you believe. You have to have courage, raw courage.

I think it is an imperfect arms control agreement. It's not a friendship treaty. But when America gives her word, we have to live up to it and work with our allies.

That's where the outrage should be, not old news, but the fact that we are preparing for the transfer of power. and we have been working with President [Barack] Obama, hand in glove, and I think that they - including the president - should step up and get his people in line and tell them to grow up and accept the fact that they lost the election.

Young people can understand, and must understand, that we had success, we had failures, but we never gave up. We never gave in. We never became bitter. We didn't hate. We continued to press on. And that's what we're saying: There are some ups, there are some downs, and when you're not down, you must have the capacity and the ability to get up and keep going.