Obama is the only President who never faced an independent investigation since Nixon

• Barack Obama is the only president since Nixon who didn't have to deal with an independent investigation.
• Former presidents George W. Bush, Bill Clinton, George H.W. Bush, Ronald Reagan, Jimmy Carter, and Gerald Ford all faced investigations into their activities or the activities of their associates.
• The observation comes as President Donald Trump is under investigation, along with his closest associates, as part of special counsel Robert Mueller's probe into Russia's interference in the 2016 election.