We've got to make sure that our economy is strong at home so that we can project military power overseas.

The problem was, and we saw some of this in the immigration-reform issues as well, was they hadn't done sufficient homework to know that I didn't have all the capacity they thought I did in order to just execute this through the stroke of a pen.

It [is] that courage that Africa most desperately needs.

I know starting careers in troubled times is a challenge, but it is also a privilege. Because it's moments like these that force us to try harder, dig deeper and to discover gifts we never knew we had. To find the greatness that lies within each of us. So don't ever shy away from that endeavor. Don't stop adding to your body of work. I can promise that you will be the better for that continued effort as will be this nation that we all love.

I do think Brexit vote speaks to the ongoing changes and challenges that are raised by globalisation.

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.

I'll change the posture of our federal government from being one of the most anti-science administrations in American history to one that embraces science and technology.