The New York Times has reported that, according to James Comey, Trump tried to get a "pledge of loyalty" from the former FBI head, which Comey would not give, days before Trump fired Comey. There were questions flying around if the reason for the firing was Comey's refusal.
NYT reported that Comey became concerned about what was going on between the president and himself and kept memos of the conversations which he shared with associates. They reported that during a Feb. 14 private meeting, Trump expressed concern about leaks and suggested maybe they should throw a couple of reporters in jail to send a message. Trump also talked to Comey about Michael Flynn, who he fired earlier for his relations with Russia, and suggested Comey just let Flynn go, which Comey interpreted as dropping the investigation into Flynn's dealings, according to the Times.
The White House responded to the NYT article, stating it was "not a truthful or accurate portrayal of the conversation."