U.S. Attorney Preet Bharara Says He Was Fired After Refusing to Quit

...Mr. Bharara’s office is overseeing the case against the former aides to Mr. Cuomo and the inquiry into fund-raising by Mr. de Blasio, who has been a target of Mr. Trump’s ire as he has positioned himself as a vocal opponent of the president’s on the left...
https://www.nytimes.com/2017/03/11/us/politics/preet-bharara-us-attorney.html