LONDON (AFP) - Straight-talking former US ambassador to the United Nations John Bolton accused a top BBC presenter of being leftwing and "a superior Brit" in a colourful on-air spat Thursday. The controversial ex-diplomat, who left the UN post in January, made the comments after fiercely defending the United States' role in Iraq and saying that force should be used against Iran if necessary. BBC presenter John Humphrys, the main anchor on the broadcaster's flagship Today radio programme, raised Bolton's hackles by asking if the US administration was not a "busted flush" after Iraq. "You're absolutely wrong ... The people...