President Trump's tweet regarding the possibility of tapes  occurred on Friday May 12.  According to Comey, he woke up in the middle of the night on Monday May 15 and realized that the tapes could confirm his account and that he had to get his memo out to "the public square."  So he called his friend and asked him to get it to the press.  

Strange that on Thursday May 11, the NY Times was already publishing stories about Comey's meeting with the President where he claims Trump demanded his loyalty.  So how could the Times know about things that was in Comey's memo, BEFORE Comey claims he released them?  Lyin, Leakin, Comey and his buddies probably leaked much more.  Drain that swamp at the FBI.  Put them all in jail...