http://www.swamppolitics.com/news/politics/blog/2008/09... by Mark Silva
The conventions, so far, have been a "net plus'' for Democrat Barack Obama, according to an analysis by the Gallup Poll.
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However, Gallup reports this: "Support for Obama since just before the Democratic National Convention kicked off on Aug. 25 has ranged from 44 percent to 50 percent, while McCain's support has ranged from 41 percent to 46 percent. Whereas the race was initially tied at 45 percent, Obama pulled into an eight-point lead at several points over the course of his convention.
"It now appears the Republican National Convention may be helping McCain to recoup some of his losses, though with Obama's current four-point lead, the entire convention period to this point has still been a net plus for Obama.
Today's results, from 2,779 interviews of registered voters Sept. 2-4, carry a possible margin of error of 2 percentage points.