It is important for us to understand that the way we are perceived in the world is going to make a difference, in terms of our capacity to get cooperation and root out terrorism. And one of the things that I intend to do as president is to restore America's standing in the world.

Making your mark on the world is hard. If it were easy, everybody would do it. But it's not. It takes patience, it takes commitment, and it comes with plenty of failure along the way. The real test is not whether you avoid this failure, because you won't. it's whether you let it harden or shame you into inaction, or whether you learn from it; whether you choose to persevere.

Michelle [Obama] never fully took to the scrutiny. I mean, she's thrived as a first lady, but it's not her preference.

Today we're seeing that climate change is about more than a few unseasonably mild winters or hot summers. It's about the chain of natural catastrophes and devastating weather patterns that global warming is beginning to set off around the world.. the frequency and intensity of which are breaking records thousands of years old.

Politics in this country [USA] is always tough. It's always contentious, because this is a big country and a diverse country, and people have strong points of view, and we've got a great diversity of interests.

I mentioned charter schools, and experimenting with our school system, to make it work. I think that's something we really have to pay attention to.

Non-Islamic, non-foreign-motivated terrorist actions have killed at least as many Americans on American soil as those who were promoted by jihadists. But what we have also seen is ISIL evolve, because of the sophistication of their social media, to a point where they may be inspiring more attacks - even if they're self-initiated, even if they don't involve complex planning - than we would have seen some time ago.