What's up with this election? First, one is leading, then the other.?

At first, Obama was supposed to be Mr. President, barely a month ago. Then, McCain started closing in big time and after Palin and the RNC he looked like he was going to turn every blue state into purple and then red. Now, he seems to be losing some steam and the media is loving it. Just because ONE poll showed Obama in the lead this morning, CNN is jumping all over it, and saying that Obama's the next president. What is up? Who do you think is going to win? Is McCain in trouble? I want HONEST AND NON-PARTISAN ANSWERS PLEASE!!!