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Methodology

For each state, the map uses the average of all public telephone polls (internet polls are not included in the average) taken within 14 days of the map's release date (all polls earlier than that will drop off). For example, the map published on October 15 does not include any poll earlier than October 1, except if the latest poll in a state was conducted before that date (for example, the most recent poll in Vermont was taken on August 31). States within a three-point lead for the Republican or Democratic candidate are classified as toss-ups; states between a five-to-eight-point lead for the Republican or Democratic candidate are classified as "lean" for that candidate; states outside the eight-point lead are allocated to the respective party. Please note: for some states, the most recent polls available at this time are up to one year old and other states with no polling yet available have been classified Republican or Democrat based on their 2008 results.

Election 2010: State of the Race

Thirty-one new polls in the past week have moved the Republicans closer to taking the Senate than any other time this year. Two toss-up states -- Colorado and Wisconsin -- move to lean Republican, while new polls show West Virginia moving from lean Democratic to a toss-up. The only bright spot for Democrats is that Sen. Pattie Murray (D) has pulled away in Washington, moving the state from a toss-up to lean Democratic. Democrats are still projected to hold 49 seats, with Republicans at 47 seats, and four too close to call.
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