The legal team is in a kind of catch-22. The more they know about what trump has done, the more legal jeopardy they are in when he asks them to commit ongoing crimes on his behalf. If they don’t know, they can fall back on the ignorance defense. And the ones who are white house counsel are in an even more difficult position, because they work for the office of the president, not for some mobbed-up former six-bit real estate grifter.
So Mueller almost certainly knows more than they do, and their problem is figuring out how much more.