Why haven't undecideds chosen their candidate already? Some voters like to mull
But that would be unusual. Late deciders tend to be divided, not vote as a block — unless they are swept up in a bigger wave, Lau said. In 1980, for example, October polls showed President Jimmy Carter in a tight race with Ronald Reagan.
"It was very close up until the last few days and somehow everybody just decided, 'Enough. We're going to change courses here,'" Lau said. "Usually what happens is that the independent voters change in the direction that somehow the nature of the times is already going."
Still, an advantage among procrastinators could swing the race in a hotly contested state.
In the last two presidential elections, about 1 in 10 voters surveyed as they left polling places said they'd settled on their candidate within the previous week. About 5 percent decided on Election Day.
No word on how many made up their minds while standing in the voting booth.
Associated Press News Survey Specialist Dennis Junius in Washington and Associated Press writer Philip Elliott in Denver contributed to this report. Follow Connie Cass on Twitter: http://www.Twitter.com/ConnieCass. Follow Jennifer Agiesta on Twitter: http://www.Twitter.com/JennAgiesta
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