From the description of Alexander Hamilton as 'the bastard brat of a Scotch pedlar', to Lyndon Johnson's depiction of Gerald Ford as a man who 'couldn't fart and chew gum at the same time', James Naughtie argues that American political language has long been teeming with insult.

He recalls as a student in 1974, queuing at the back door of the White House one evening and coming away with transcripts of the Watergate tapes, full of 'expletive deleted' notes 'that blacked out various Nixon explosions.'

But in our own time, James says, something quite different is at play. The language of politics today, he says, 'instead of being punctuated by insults, it's become enslaved to them. And the more exaggerated political language becomes, the more it is devalued - because it has lost its true purpose.'

Producer: Adele Armstrong Sound: Peter Bosher Production coordinator: Gemma Ashman Editor: Richard Fenton-Smith