If Obama actually leads by 4 nationally at the moment, most of the recent state polls look fine.
Except this outlier poll from We Ask America in VA and the close MI polls. The Rasmussen poll showing Obama up 8 would make sense.
Of course I distrust any online poll... recent changes in polling results could result from the end of a poor news cycle. There still is the impending USSC decision on the Affordable Care Act and there is the European debt mess.
Exposure of the business practices of Mitt Romney at Bain Capital can't help the challenger.