Former FBI director revealed in a closed-door interview that the Russia investigation initially focused on four Americans.

The document was made public just 24 hours after former FBI chief James Comey was grilled on Hilllary Clinton's emails and U.S. President Donald Trump's campaign.

In his highly anticipated interview with ABC, Comey eviscerated his former boss Trump as a serial liar who is "morally unfit to be president," comparing his attitude to that of a mob boss.