Former U.S. Attorney Preet Bharara revealed on Sunday that he received a handful of "unusual" phone calls from Donald Trump after the November election that made him feel uncomfortable, and said he was fired after declining to take the third call.

Speaking on ABC News' "This Week" in his first televised interview since Trump fired him in March as the top federal prosecutor in Manhattan, Bharara said he believed Trump's calls to him violated the usual boundaries between the executive branch and independent criminal investigators.

"It's a very weird and peculiar thing for a one-on-one conversation without the attorney general, without warning between the president and me or any United States attorney who has been asked to investigate various things and is in a position hypothetically to investigate business interests and associates of the president," Bharara said.