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Poll-watchers might not have noticed any movement on the national level yesterday, but the state polls were pure bad news for McCain. A series of polls showed Obama with big leads in nearly all the swing states—double-digit margins in Pennsylvania, Ohio, and Wisconsin, as well as advantages in Florida, Indiana, and North Carolina. Nate Silver calls it McCain's worst polling day of the year, and docks nearly three points of McCain's chances of winning the election, which he now calculates at a measly 3.7 percent.