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Australian political strategist Lynton Crosby listens to Conservative London Mayoral candidate Zac Goldsmith address delegates on the third day of the annual Conservative party conference in Manchester, north west England, on October 6, 2015. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images)

Australian political strategist Lynton Crosby listens to Conservative London Mayoral candidate Zac Goldsmith address delegates on the third day of the annual Conservative party conference in Manchester, north west England, on October 6, 2015. AFP PHOTO / OLI SCARFF        (Photo credit should read OLI SCARFF/AFP/Getty Images)