Comey compares president to a 'mob boss' in new book
James Comey, the former FBI director, has compared the US president to a "mob boss" in an interview ahead of the release of his bombshell new book.
Mr Comey was fired by Donald Trump last May and is doing a round of media interviews promoting his book 'A Higher Loyalty' ahead of its publication on Tuesday.
The sacking of the FBI chief has been seen as one of Mr Trump's most controversial decisions in office and led to questions over whether it amounted to obstruction of justice - one of the grounds for impeachment.
US network ABC News has released a trailer ahead of their interview with the former intelligence chief, in which he refers to Mr Trump as a "mob boss".
The interview, which airs in the US on Sunday evening, is "going to shock the president and his team", a source told the political website Axios. The source added that the revelations left people in the room "stunned".
The firing of Mr Comey, who was leading the Russia probe at the time, is a key event being looked at by Robert Mueller, the special counsel who has been appointed to take over control of the investigation.
Mr Mueller is reported to have interviewed Mr Comey about the US president's behaviour in the run up to his firing.