Subject: Re: Audio of Trump's Conversation
But even here, even if the map were in fact open for all to see, unless the person(s) he showed it to was actually able to discern anything, it would not seem to be so harmful to national security. Or at least that's what I would argue if I was one of Trump's third-rate lawyers.

They shouldn't argue that - because it's not relevant to the case. Trump wasn't charged with revealing classified information to an unauthorized party. He was charged with unlawfully retaining defense information after the government demanded its return - and then a bunch of charges from his efforts to hide the fact that he did that.

It doesn't matter whether the interviewer was able to see the map clearly. The tape will be used to show that Trump retained possession of national defense information long after he left office and that he was aware that there were rules governing those documents that still applied to him.