Democrat Barack Obama has expanded his lead over Republican John McCain in today's Gallup Tracking Poll and now is ahead 52%-41%. Gallup says it's Obama's largest margin of the campaign and also the first time he's made it to 52%.
Like other tracking polls, this one is based on three nights of polling, Sunday through Tuesday. Almost all interviews were done before the presidential debate last night.

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onpolitics/2008/10/obama-reaches-r.html

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