KEY POINTS
  • Former FBI Director James Comey gave an interview to ABC News' "20/20" in advance of publication of his new book, "A Higher Loyalty: Truth, Lies, and Leadership."
  • President Donald Trump fired Comey last May.
  • Comey's termination set in motion the appointment of special counsel Robert Mueller, who is investigating Trump campaign officials for possible collusion with Russia during the 2016 presidential election.

Former FBI Director called President "morally unfit to be president" in a new interview with ABC News' "20/20" Sunday night and said it is "possible" that Russia has something it can blackmail Trump with.

In an exclusive interview with ABC News Chief Anchor George Stephanopoulos, Comey said, "Our president must embody respect and adhere to the values that are at the core of this country."