Those years on the golf course as a caddie, boy, those people were something. They were vulgar, some were alcoholics, racist, they were very difficult people to deal with. A lot of them didn't have a sense of humor.

I was a celebrity. This is not what I do for a living - politics. I play politicians, as well as working class or clergy or whatever, and you mustn't be confused by what you're seeing on television because that's not who I am. So I always ended it.

Once you experience Third World poverty, you're really changed forever, if you're at all open to it, because we're all united in our common humanity. And we are so made as to feel something for people who are in pain. It's not possible to be human and to be unaffected by what you see in the third world.

One of my favorite episodes in West Wing was the homeless man that died and they found, in the overcoat he was wearing, a card of the speechwriter, Toby. He had given that coat to the Goodwill and this guy had ended up wearing it, died in it and Toby went to his funeral. He turned out to be a Korean war veteran. It was our first Christmas episode and that was a true story - a member of the staff had done exactly that. So many of these stories were far better than any fiction.

Nothing ever gets done unless it's done by a fanatic.

The key word about The West Wing is show. It is not a reality show. It has nothing to do with reality.

I was the last one to join the cast of the west Wing and when I started it was just a peripheral character - the focus was to be on the staff, not the First Family. When I did the pilot, my contract was for just three years and it was confined to maybe three or four episodes every season. The only restraint I had was that I could not play another President while the show was on the air. So, I kind of backed into one of the great events of my life and certainly my career.