Computer model shows perfect storm for Obama

President Barack Obama is running against former Massachusetts Gov. Mitt Romney, but the economy may truly be his greatest opponent.
"It's not the only factor, but it's arguably the most important factor," said George Washington University associate professor John Sides, who has created a computer model to analyze the impact of the economy on the presidential campaign.
"The forecasting model suggests a very close race with maybe a slight edge to Obama, but not necessarily a large edge -- nothing he can be very confident in," Sides said.