Dear Director Comey,Donald, even if Comey were prime evil himself, you can not fire someone who is investigating you. (Even if Democrats did or do not like him.)
While I greatly appreciate you informing me, on three separate occasions, that I am not under investigation, I nevertheless concur with the judgment of the Department of Justice that you are not able to effectively lead the Bureau.
Donald J. Trump
Donald, it would have been better not to talk about the FBI investigating you. (It only puts more focus on these investigations.)
Donald, you can not talk to Comey about ongoing investigations, especially investigations about yourself. (And there is no evidence that Comey informed you.)
Donald, do not write about your FBI investigations when your official reason for firing Comey was that he was not fair to Clinton. (And a many months old incident is not a good excuse for firing someone in a panic.)
Donald, you cannot write that refraining from investigating you would be a reason not to fire Comey. (The rule of law makes America a free country.)
Related readingVox: Experts on authoritarianism are absolutely terrified by the Comey firing
NBC News: Trump Interview With Lester Holt: President Asked Comey If He Was Under Investigation. And admits that his Clinton story about Comey’s firing was an excuse at best.
Mother Jones: What the Hell Is Going on With Trump's Delay on the All-Important Paris Decision? Ivanka saves the world? Hah.
Secular Talk: Congressman Is Now Officially A Justice Democrat