Where's the scandal in this? Smells like desperation to me.
"Better hopes there're no tapes" was a remark of desperation.
There's no scandal here.
While Trump's having made the puerile remark is
scandalous, there is no scandal. Is anyone claiming there
is a scandal? I'm certainly not.
The fact of the matter is that Trump knew when he made the remark that he was equally then as now unaware of there being any audio/video record of the conversations. Knowing that, he shouldn't have made that remark.
Comey's attestation of the nature of Trump's comments to him is what gave rise to Trump's making the remark. Trump refuted Comey's attestation and then made the "tapes" statement. The intent of his "tapes" comment is clear: he aimed to cow Comey into recanting or attenuating his attestation.
Making the remark Trump did, to any person of integrity, would be unconscionable for the matter at hand is the veracity of Comey's assertion about what Trump said, not whether one is truly, say, holding a winning poker hand. A person of integrity, having tapes that refute Comey's statements, wouldn't make the statement; they'd merely release the tapes and let everyone see that Comey misrepresented the truth. Indeed, given Trump's track record of having a tenuous relationship with the truth, it'd have been more in his interest to handle the matter than way had he tapes for it could well have marked the first time that Trump said something of note for which there was incontrovertible evidence that he was telling the truth.