Here’s our daily composite of the six major national tracking polls. The recent tightening in the race appears to have stopped for today, with Obama’s lead expanding slightly:

    • Gallup: Obama 51%, McCain 44%, with a ±2% margin of error, unchanged from yesterday.

    • Rasmussen: Obama 51%, McCain 46%, with a ±2% margin of error, compared to a 50%-47% Obama lead from yesterday.

    • ABC/Washington Post: Obama 52%, McCain 44%, with a ±2.5% margin of error, unchanged from yesterday.

    • Hotline/Diageo: Obama 48%, McCain 42%, with a ±3.3% margin of error, compared to a 49%-42% Obama lead from yesterday.

    • Research 2000: Obama 50%, McCain 45%, with a ±3% margin of error, compared to a 50%-44% Obama lead yesterday.

    • Zogby: Obama 50%, McCain 43%, with a ±2.9% margin of error, compared to a 49%-44% Obama lead from yesterday.

Adding these polls together and weighting them by the square roots of their sample sizes, Obama is ahead 50.5%-44.2%, a lead of 6.3 points, compared to the 50.2%-44.4% Obama lead from yesterday.

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