UPDATED: Judge Sullivan's Challenge

Despite the fact that Judge Sullivan totally shot himself in the foot with his absurd speculation regarding the possibility of General Flynn being charged with treason, it does appear that Sullivan remains focused not only on the misconduct (read: possible criminal conduct) by Team Mueller and the FBI, but also on the legal insufficiency of the charge against General Flynn--False Statements to the US Government, 18 USC 1001.

In that regard, legal tweeter Techno Fog flagged this fascinating exchange--note that the "Kelner" who responds to Judge Sullivan is one of Flynn's attorneys, Michael Kelner:

Techno Fog‏ @Techno_Fog

Near adjournment, Judge Sullivan mentions that he will likely have "many, many, many more questions" - including: 1) how the gov't investigation was impeded 2) What was the material impact of the crimes /end

6:25 PM - 18 Dec 2018

The important point Sullivan has in mind comes toward the end, when he says:

"These are questions that you would prepared to answer anyway, such as, you know, how the government's investigation was impeded? What was the material impact of the criminality? Things like that."

Obviously Flynn's lawyer, Kelner, likes what he's hearing, is very much in favor of "things like that," and he says so: