it's a reference to this in the indictment:

While meeting with Trump Attorney 1 and Trump Attorney 2 on May 23, TRUMP, in sum and substance, told the following story, as memorialized by Trump Attorney 1:

"[Attorney], he was great, he did a great job. You know what? He said, he said that it – that it was him. That he was the one who deleted all of her emails, the 30,000 emails, because they basically dealt with her scheduling and her going to the gym and her having beauty appointments. And he was great. And he, so she didn’t get in any trouble because he said that he was the one who deleted them. "