WASHINGTON — President Barack Obama and Republican challenger Mitt Romney are neck and neck in opinion polls, but there is one area in which the incumbent appears to have a big advantage: Those who have already cast their ballots.
Obama leads Romney by 59% to 31% among early voters, according to Reuters/Ipsos polling data compiled in recent weeks.
The sample size of early voters is relatively small, but the Democrat’s margin is still well above the poll’s credibility interval — a measurement of polls’ accuracy — of 10 percentage points.
With the November 6 election just more than three weeks away, 7% of those surveyed said they had already voted either in person or by mail.
The online poll is another sign that early voting is likely to play a bigger role this year than in 2008, when roughly one in three voters cast a ballot before Election Day…
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