WASHINGTON (Reuters) - President Barack Obama holds a narrow lead of 1 percentage point over Republican Mitt Romney as the race for the White House remains effectively tied less than two weeks before the November 6 election, according to a Reuters/Ipsos daily tracking poll released on Friday. Obama leads Romney among likely voters by 47 percent to 46 percent, well within the online survey's credibility interval. Neither candidate has held a clear lead since shortly after their first presidential debate on October 3. ...

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