Jon Snow interviews the writer Gore Vidal on the American presidential campaign - he dismisses John McCain as Mr Magoo and says he should have been court-martialled.
His career has spanned more than six decades, and he has written more than 20 novels and five plays. Gore Vidal is one of Americas most respected writers and thinkers, and is considered a patriarch of American letters and Democratic politics.
He is highly critical of George W Bush's administration. But what does he have to say about the bitter contest for the Democratic nomination?
This afternoon Jon Snow spoke to Gore Vidal here in London. They discussed the race to lead America and the candidates presenting themselves for president, starting with John McCain.
To watch Jon Snow's complete interview with Gore Vidal, click here.