<Trump attorney>...."Cool audio bro, now show me the video of the documents and exactly what they were being shown."
Some audio recording with Trump boasting about the documents, he was showing the snitch, doesn't mean he actually showed him classified intel. He could have been showing them any document he wanted, doesn't mean it was classified. That will be the defense.
If he was POTUS at the time, he can simply say he declassified them before sharing. Period, the end. POTUS has full authority and autonomy over such matters.