All of our presidents come into office looking so vigorous ... They grow grayer and grayer, and by the time they leave, they’re as white as the building they live in ... I have one big advantage: I’ve been coloring my hair for years. So you’re not going to see me turn white in the White House.

I think there has to be a recognition that, you know, there's so much at stake now, I mean, the business has changed so much and decisions are made so quickly, in nano seconds basically.

The only wealth I have to give, is not material - and if you need much more than that, I'm not available.

It just seems to me that this is something that the American people deserve to see. And I have no reason to believe that [Donald Trump] is ever going to release his tax returns, because there's something he's hiding.

There's no such thing as other people's children.

When an army unit returns from service in Iraq or Afghanistan, it barely gets a breather before it begins training for its next deployment.

Historically, it is important to try to understand your adversary in order to figure out how they are thinking, what they will be doing, how they will react.