High points and low points of the Obama presidency

Barack Obama's presidency has been a roller coaster ride -- for the fragile economy, for his job-approval ratings and for his supporters and detractors alike. He has scored historic legislative triumphs and historic midterm election setbacks. Two months before the 2012 general election, Obama remains the most divisive American president since ... well, George W. Bush. Here are five of the high points and five low points of the Obama presidency