People protest against President Donald Trump's firing of FBI Director James Comey, on Trump's star on the Hollywood Walk of Fame in Los Angeles, California, US, May 12, 2017. [Photo/Agencies]

July 7, 2016: Comey vigorously defends the decision not to prosecute Clinton over her use of a private email server as secretary of state. Under an onslaught of Republican criticism, Comey says that to charge Clinton would have been unwarranted and mere "celebrity hunting."

Oct 28, 2016: Days before the election, Comey informs Congress by letter that he is reopening the investigation into Clinton's email practices based on new evidence, citing the discovery of emails on a laptop used by a top Clinton aide. Justice Department officials warn Comey against sending the letter, saying that doing so would be inconsistent with department policy meant to avoid the appearance of prosecutorial interference or meddling in elections.

Oct 28, 2016: Trump reacts to FBI's decision to investigate new messages related to Clinton's emails, telling a campaign rally that he has "great respect for the FBI for righting this wrong."

Nov 6, 2016: Comey tells Congress in a follow-up letter that a review of newly discovered Clinton emails has "not changed our conclusions" that she should not face criminal charges.

Nov 6, 2016: Trump criticizes Comey's second letter to Congress, saying Clinton was being protected by a "rigged system" and pronouncing her "guilty," despite the FBI's conclusion that criminal charges were unwarranted.

Nov 8, 2016: Trump is elected president.

Nov 12, 2016: During a telephone call with top campaign donors, Clinton blames Comey for her defeat by Trump. Clinton said her campaign was on track to win the election until Comey sent the letter to Congress on Oct 28.

Nov 13, 2016: In a CBS "60 Minutes" broadcast after the election, Trump says he hasn't decided whether to keep Comey.

Jan 6, 2017: Comey is among a group of four top US intelligence officials who brief the president-elect on their conclusions that Russia meddled in the presidential election on his behalf. Trump tells The Associated Press by telephone after the meeting that he "learned a lot" but declines to say whether he accepted their conclusion about Russia.

Jan 22, 2017: Two days after taking office, Trump appears to single out Comey at a White House reception to thank law enforcement officers and others that helped during the inauguration. Trump calls Comey over to where he is standing in the Blue Room to offer a handshake and a partial hug, then comments that Comey has "become more famous than me."

Jan 27, 2017: At one-on-one dinner at the White House, Trump asks Comey to pledge his loyalty to the president and Comey declines, according to a person close to Comey, speaking after the FBI director was fired. The White House denies that account.