Apples and oranges. “Using” a law firm is not the same thing as heading a legal team — nor does it even compare to “retaining” an attorney or firm to represent you in current and future legal matters. To follow Tempmanoa’s logic, a reporter should be banned from ever writing a story about McDonald’s because he ate a Big Mac 17 years ago. As long as Robert Mueller himself did not represent the Trumps at any point, and the firm at the time Mueller was named and subsequently, there is no conflict.