"James Comey better hope that there are no 'tapes' of our conversations before he starts leaking to the press!" Looks like Trump tried to bully Comey because he knows what Comey is going to say. Unfortunately, he did so in the stupidest way possible: If he can't produce tapes refuting what's in the Comey memos, they will be accepted as factual.
Here's a scenario for the board to chew on:
I just kind of had the thought that Comey might have lied to Trump in the meeting - and that would be okay.
Law Enforcement people can lie to suspects in the course of an investigation.
Pres: Am I under investigation?
FBI: No (A lie, in hopes the Pres/suspect now says something incriminating)
Trump might not be understanding that yet. He thinks that if he gave Comey an order and Comey agreed to obey, then later didn't, then he (Trump) has something on Comey. He thinks if he (Trump) asked a question and Comey's answer was later proven untruthful, then Trump has something on Comey.
LE investigations don't work that way.
If Comey felt that Trump gave him illegal orders, and felt that Trump was a suspect in an investigation, then Comey could lie. He could say that he would agree to do what Trump said, hoping that Trump would say even more incriminating things.
Trump may have thought he was a boss giving orders.
Comey may have thought this was the oddest undercover investigation of his career, in which Comey pretended to be an unethical version of himself.