Of course they can throw the election either way; it's going to be another close one. The reason it says that the two are tied in some states is because it's based on percent. They're gathering the data from various groups around the country in every state, and since no one's doing as in-depth polling as will be administered during the actual election, this sort of estimate is the best we're going to be able to get. Sheesh people, give it some credit.