May 18, 2017: Trump criticizes the special counsel appointment, saying that Obama and Clinton deserved special investigations. Trump tweets, "this is the single greatest witch hunt of a politician in American history!" May 31, 2017: In a series of tweets, Trump accuses Comey of lying under oath. June 8, 2017: Comey testifies before the Senate intelligence committee, detailing his conversations with Trump, and repeatedly calling him a liar. June 9, 2017: Trump again accuses Comey of perjury, saying in a tweet: "Despite so many false statements and lies, total and complete vindication ... and WOW, Comey is a leaker." Trump goes on to say at a press conference that "some of the things that [Comey] said just weren't true." Around June 10, 2017: Trump considers firing Justice Department special counsel Robert Mueller, his friend and ally Christopher Ruddy says. Trump's advisers urge him not to do it, according to news reports. June 15, 2017: Trump again says the Russia investigation is the "single greatest witch hunt" in US history. June 16, 2017: Trump criticizes Rosenstein on Twitter, saying: "I am being investigated for firing the FBI Director by the man who told me to fire the FBI Director! Witch Hunt."