Obama Faces Battle For New Hampshire!!!... What does this mean?

If you look at the map of the 2004 election, and compare it to this year, you will see that Obama is ahead in all the states that Kerry won, plus he is ahead in Iowa and Colorado, and he has a very good chance of taking Virginia, New Mexico and Nevada, and possibly some others. So in order to win, McCain will probably have to take some states that Kerry won in 2004. He is setting his sights on Michigan, Pennsylvania, New Hampshire and some others. The article suggests that New Hampshire might be tough for McCain to win.