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The Pollster.com composite now has Obama above 50 percent for the first time. And looking at the individual polls, one can get a better sense of just how difficult it would be for McCain to surpass Obama. First of all, there are just four polls all year that have shown McCain over 50%, all of them outliers: Gallup, 1/10-13: M50, O45 Rassmusen, 3/22-25: M51, O41 Gallup, 9/5-7: M54-O44 Rasmussen, 9/11-13: M50, O47 In the same time frame, there have been about 36 polls that have given Obama a +50 percent result. Since October 1st, Obama has cracked 50 percent in 10 polls, while McCain has been unable to crack 45 in any.