Manchester noted that "Gallup's September 24 report foresaw 46.5% for Dewey to 38% for Truman. His last column, appearing in the Sunday papers two days before the election, showed Truman gaining sharply – to 44 percent – and the interviews on which it was based had been conducted two weeks earlier. The national mood was shifting daily, almost hourly." After the election, a study by the University of Michigan revealed that "14% of Truman's voters, or 3,374,800, had decided to vote for him in the last fortnight of the campaign." Gallup and Roper also did an analysis of the votes, they "learned that one voter in every seven (6,927,000), made up his mind in the last two weeks before the election. Of these, 75 percent picked Truman", which was more than his margin of victory over Dewey. "Using either the Michigan figures or Gallup-Roper's, one finds that some 3,300,000 fence-sitters determined the outcome of the race in its closing days – when Dewey's instincts were urging him to adopt Truman's hell-for-leather style and slug it out with him, and when he didn't because all the experts told him he shouldn't."