Salon.com | How will Barack Obama get to 270?: "If Obama wins the 255 votes in the states where he's favored, then to get to 270 he needs to choose from the following menu: 1) Win Ohio, which takes him to 275; 2) win in the West -- Nevada, New Mexico and Colorado, for 274; 3) win the three N's (Nevada, New Mexico, New Hampshire) for 269, plus one other state; or 4) win two of the three N's and either Colorado or Virginia."
This is from a Democratic pollster. You can ignore the national polls that show Obama ahead. We don't elect presidents that way. This is the nitty gritty. You have to win state by state and put together at least 270 out of the possible 538 electoral votes. And if you read this detailed piece, you will see that it won't be easy for Obama to reach 270. Certainly it is possible, but it won't be easy.