I've been doing Nixon pretty much my whole professional life. I was in this comedy group called the Credibility Gap in Los Angeles when he was president. I was doing Nixon on the radio, and when we did live shows I physicalized him - if that's a word - for the first time. And then I did a Nixon sketch on a very short-lived NBC show called Sunday Best.

Nixon's genius was that he was able to portray himself as the toughest of the anti-communists, and yet run on a platform that he had a plan to end the Vietnam War. And, of course, his plan was to prolong it until his second election - but he didn't tell us that then.

I didn't have a lot of independent film connections. It really took until the digital film revolution came along that I realized that I could do it myself.

The first thing you've got to do is know your craft, and then you can do something else with it.

[The word class has] been excised from the acceptable political vocabulary, except in the limited usage of right-wingers when they accuse liberals of inciting 'class warfare' - a charge that means it's okay for rich people to vote their economic interests but it's not all right to encourage poor people to do so.

There were really funny characteristics about this guy [Richard Nixon], chief of which would be that he seemed to devote about 85 percent of his waking energy to suppressing any sign of his emotional response to anything that was going on around him, and the other 15 percent blurting out those authentic responses in the silliest and most inopportune ways. And he had these smiles that would come at the most inappropriate times - just flashes that there was an inner life screaming to get out.

Because I don't do stand-up, radio has always been my equivalent, a place to stay in connection with the public and force myself to write every week and come up with new characters. Plus it's a medium that – having grown up with it and putting myself to sleep with a radio under my pillow [as a kid] – I love. No matter what picture you want to create in the listener's mind, a few minutes of work gets it done.