>>2095805 (lb)
Rule 401. Test for Relevant Evidence
Evidence is relevant if:
(a) it has any tendency to make a fact more or less probable than it would be without the evidence; and
(b) the fact is of consequence in determining the action.
Notes
(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1931; Apr. 26, 2011, eff. Dec. 1, 2011.)
So, if the defendant is claiming that one or more of his persecutors (or prosecutors) is effecting a malicious prosecution, mueller wants the previous vindictive prosecution histories of his "pit bull" and other ankle-biters excluded.
I don't think he can prevail under rule 401, but alas, I am not a lawfag.