The poll of polls at RealClearPolitics took a jump today with Obama +7.2 at 50.2% against McCain at 43%.

The less volatile Pollster.com today shows a lesser gap:

Meanwhile, Nate Silver at FiveThirtyEight.com gives a primer on pollsters, the quirks and reliability of the several tracking polls, a post I recommend if you have any interest in the field.

Finally, Josh Marshall at Talking Points Memo gives a video roundup of how all the national polling is playing out in the Electoral College:

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