Obama branded America a 'racist society' in unpublished manuscript claims biographer who says the revelation from his law school days could have scuppered his 2008 presidential bid

  • Historian David Garrow claims to have uncovered significant revelations about Obama for his upcoming biography on the former president
  • One revelation was that Obama called America a 'racist society' in an unpublished book he wrote in the 1990s while in law school 
  • Garrow said it was possible some revelations could have derailed Obama's candidacy if they surfaced in 2008
  • He won a Pulitzer Prize for his 1987 biography on Martin Luther King Jr.