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At the end of May 2007, Ayalon was one of two candidates for the leadership of the Labor Party in ongoing party primaries. In January 2007, public opinion polls showed Ayalon leading the race, followed by former Prime Minister Ehud Barak and Ophir Pines-Paz. He retained this lead, and just four days before the poll, on 25 May, was four points ahead of his closest rival, Ehud Barak, with 35% to Barak's 31%.