Aug. 30 (Bloomberg) -- Barack Obama jumped to his biggest lead since late July in public opinion polls, after his televised speech to more than 75,000 people in a Denver football stadium and his Democratic National Convention reconciliation with rival Hillary Clinton.
How long Obama holds the lead is open to question, as voters react to John McCain's surprise selection yesterday of Alaska Governor Sarah Palin for his running mate and Republicans begin their nominating convention Sept. 1 in St. Paul, Minnesota.
Obama leads McCain 49-41 percent in the most recent Gallup Poll daily tracking survey, which measured voter sentiment during a three-day period ending Aug. 28. The presidential contenders had been tied at 45 percent in the last Gallup tracking results before the Democrats started their Colorado convention.
The 8 percentage-point lead almost matches Obama's biggest margin of the campaign, a 9-point bulge in tracking polls conducted July 24-26, Gallup said.
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