Well if you listen to the MSM you would think it was because of the spat between him and Hillary over race. That doesn’t seem to be the case though:

`Now I’m voting my heart, with Obama,” said Cheryl Ewing, a 47-year-old program manager from Philadelphia. Only six weeks ago at a focus group conducted by pollster Peter Hart, Ewing, who is black, said she was in Clinton camp’s because America wouldn’t vote for a black president. “Iowa made me change my mind.”

No mention of the Hillary spat there. Of course the MSM thinks we are all tools who will vote for who they want and can’t change our minds without them telling us to. That is the big flaw in their logic and why they continue to look like total idiots.