News of another FBI review of Democratic presidential nominee Hillary Clinton's emails may not change the outcome of the election. But it could poison a Clinton presidency.
At this stage of the campaign, most voters have made up their minds. More than 12 million early and absentee votes had already been cast when the new investigation was revealed.
Last-minute revelations do not typically have much impact because they are seen as political. That appears to have been the case in 2000, when the story broke a few days before the election that Republican nominee George W. Bush had once been arrested for drunk driving in Maine. At the end of a campaign, when passions are running high, everything is seen as political.
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