Blame the republicans that Obama is a noob:  Joel Klein says republicans are smearing Obama because he is inexperienced?:

“There is a straight up argument to be had in this election: Mcain has a vastly different view from Obama about foreign policy, taxation, health care, government action…you name it. He has lots of experience; it is always shocking to remember that this time four years ago, Barack Obama was still in the Illinois State Legislature.”