Barack Obama raised a record-shattering $750 million on his way to winning the 2008 presidential election. But that stunning flood of cash has triggered an investigation by the Federal Election Commission, which is taking a detailed look at the campaign's records and transactions.

According to Roll Call, the audit of Obama's financial records began Barack Obama, Federal Election Commission, Investigation, 2008 Presidential Electiontwo years ago. It was not required by law, since the Obama campaign did not accept federal matching funds and funded itself entirely with private donations. But allegations of improper contributions, coupled with the FEC's suspicions of certain transactions, led to the probe.