Is Obama's momentum a media hoax? What Obama supporters don't want you to know?

Of course Obama is behind in Ohio and Texas, he hasn't even campaigned there yet and we know when Obama starts to campaign in a state that he's behind in he usually closes the gap. In Virgina he was behind by 20 points , 2 weeks before they held their primary and he won. In Missouri he was behind by over 10 points before super Tuesday and yet he won that state.