Over the last half century the television interview has given us some of TV's most heart-stopping and memorable moments. On the surface it is a simple format - two people sitting across from one another having a conversation. But underneath it is often a power struggle - a battle for the psychological advantage.
You often see politicians who try to put on a different persona; they think they should be more jolly or serious. Invariably, the persona they choose is worse than their own.
