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Nick Clegg, U.K. deputy prime minister and leader of the Liberal Democrats, poses for a photograph following a Bloomberg Television interview in London, U.K., on Monday, June 9, 2014. Clegg outlined the first elements of his party's economic platform for next year's election with pledges to eliminate the structural budget deficit by 2018 and then tie most future spending to economic growth. Photographer: Jason Alden/Bloomberg via Getty Images

Nick Clegg, U.K. deputy prime minister and leader of the Liberal Democrats, poses for a photograph following a Bloomberg Television interview in London, U.K., on Monday, June 9, 2014. Clegg outlined the first elements of his party's economic platform for next year's election with pledges to eliminate the structural budget deficit by 2018 and then tie most future spending to economic growth. Photographer: Jason Alden/Bloomberg via Getty Images