<i>Obama early vote edge tenuous</i>
President Barack Obama is leading in an unprecedented early voting push by both campaigns that has already seen an estimated 22 million people cast ballots.
But some independent observers said that the president's lead may not be wide enough to make up the difference between Obama and Mitt Romney in some key battleground states on Election Day.
In its poll, conducted this week, Pew reported that neither Obama nor Romney “has a clear advantage among early voters. This is in sharp contrast to early voting at this point four years ago, which favored Obama by a wide margin.”
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