US comedian Jon Stewart has politicians queuing up to appear on the satirical news programme The Daily Show. Senators McCain and Obama have both been interviewed on it.
But what is it that makes The Daily Show so popular, and why is its comedian presenter now being talked about as one of the most trusted men in American media?
Chris Bowlby considers the man who has brought satire to the centre of US political life.
BBC Radio 4's Profile was first broadcast on Saturday 23 August at 1902 BST.