Fridays polling should make it easy to discern why Mr. Obama has the Electoral College advantage.
There were 22 polls of swing states published Friday. Of these, Mr. Obama led in 19 polls, and two showed a tie. Mitt Romney led in just one of the surveys, a Mason-Dixon poll of Florida.
[These polls] represent powerful evidence against the idea that the race is a tossup. A tossup race isnt likely to produce 19 leads for one candidate and one for the other any more than a fair coin is likely to come up heads 19 times and tails just once in 20 tosses. (The probability of a fair coin doing so is about 1 chance in 50,000.)
Election Forecasts - FiveThirtyEight Blog - NYTimes.com