@Kiwi Re: Two things..
Does Trump have the tapes?
This could be a bluff. If its a bluff then its only as effective as long as you don't know the answer to the question.
If this isn't a bluff and Trump's staff admits to there being tapes... then you have a real problem for Trump. Those tapes could be subpoenaed. This is what caught Nixon and forced him to resign.
It also begs the question... if there are tapes, then what else did Trump record? And again those recordings would be subpoenaed as well.
Its a bad bluff on the part of Trump.
But the real question... did Comey lie under oath because he claimed Trump's tweet is what forced him to leak (which is itself a crime) or is Trump's lawyer right that Comey leaked before Trump's tweet.
That would be a very easy thing to prove.