With eye on Downing Street, Boris bets all on Brexit

By William James and Estelle Shirbon LONDON (Reuters) - With one hand in his suit pocket and the other mussing his signature blond hair, Boris Johnson on Sunday took the riskiest gamble of his career: to oppose Prime Minister David Cameron by campaigning for Britain to leave the European Union. If the stars align for London's eccentric mayor and the voters agree with him in a June 23 referendum, his bet could help him win Cameron's job. A natural comedian known to all by his first name, the dish