One very difficult decision was deciding to vote against the appropriations bill for the war. I had consistently said that I wanted to make sure our troops got the adequate and training in the war effort, despite the fact that I opposed the war at the point that the president decided to double down and send more troops. I had to vote against funding as a way of bringing it back to the table. That was a difficult decision for me.

My liberty depends on you being free, too.

[The Democrats] have got to do a better job of showing up.

When it comes to immigration, I have actually put more money, under my administration, into border security than any other administration previously. We've got more security resources at the border - more National Guard, more border guards, you name it - than the previous administration. So we've ramped up significantly the issue of border security.

For more than 60 years, the United States has stood by our allies and partners in the Asia Pacific. That includes our defence partnership with Singapore, which stretches back more than two decades.

I found during the course of my political career on the national scene there's a point where the vanity burns away and you've had your fill of your name in the papers, or big adoring crowds, or the exercise of power. And for me that happened fairly quickly. And then you are really focused on: What am I going to get done with this strange privilege that's been granted to me? How do I make myself worthy of it?

No country should deny people their rights because of who they love, which is why we must stand up for the rights of gays and lesbians everywhere.