Such an outcome would mean that the state-by-state polls were off by more than six points.

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State-by-state polls show Bush is highly competitive in several states not carried by Republicans since his father won the presidency in 1988, including Ohio, Wisconsin, Missouri, Oregon and Washington.

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Self-described liberals, comprising 57 percent of the state's electorate, backed Obama by 20 points, 60-40 percent, according to exit polls.

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