The election of the president of Iran in 2009 was preceded by many Iranian surveys and a survey by the US-based Terror Free Tomorrow organization. The Terror Free Tomorrow opinion poll, conducted from 11 to 20 May 2009, predicted the high participation and showed similar ratios for the candidates to the later official result, with over a quarter yet undecided. The many Iranian surveys show a wide range of differing results. An opinion in the "New York Times" claims that this is due to the high fluctuation among voters during the campaign season.