He masterminded George Bush's transformation from boozing brat to national leader, and has been called the most powerful adviser in the White House. Now Karl Rove is in charge of the $150m campaign to re-elect Bush. Who is the man the president calls his 'boy genius'?

In the autumn election season of 1970, a cherubic, bespectacled teenager turned up at the Chicago campaign headquarters of Alan Dixon, a Democrat running for state treasurer in Illinois. No one paid the newcomer much attention when he arrived ...

.... or when he left soon afterwards. Nor did anyone in the office make the connection between the mystery volunteer and 1,000 invitations on campaign stationery that began circulating in Chicago's red-light district and soup kitchens, promising "free beer, free food, girls and a good time for nothing" for all-comers at Dixon's headquarters.

As political dirty tricks go, it was minor league. Hundreds of the city's heavy drinkers and homeless turned up at a smart Dixon reception looking for free booze. Dixon was embarrassed but the plot

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