Source close to Comey says there were 2 reasons the FBI director was fired

Washington (CNN)There are two reasons why President Donald Trump fired James Comey, according to a source close to the now-former FBI director:

Comey never provided the President with any assurance of personal loyalty.
The fact that the FBI's investigation into possible Trump team collusion with Russia in the 2016 election was accelerating.

The official White House version of what happened is that deputy Attorney General Rod Rosenstein, fresh on the job, wrote a memo expressing concern about the way Comey had handled the Hillary Clinton email investigation.
But mounting evidence suggests Comey was actually fired because of the Russian investigation.
Rosenstein, in his memo, faulted Comey for being unfair to Clinton when he announced his conclusion last July that the case against Clinton should be closed without prosecution. He also criticized Comey for holding a press conference in which he "Release(d) derogatory information about the subject of a declined criminal investigation."

http://www.cnn.com/2017/05/10/politics/donald-trump-james-comey-russia/index.html