According to the FEC, the Judge donated to ActBlue and not to Joe Biden.
Either way, it is violation of the New York Rules of Judicial Conduct which states in salient part
Section 100.5 A judge or candidate for elective judicial office shall refrain from inappropriate political activity. (A) Incumbent Judges and Others Running for Public Election to Judicial Office. (1) Neither a sitting judge nor a candidate for public election to judicial office shall directly or indirectly engage in any political activity ***
Prohibited political activity : ***
(h) soliciting funds for, paying an assessment to, or making a contribution to a political organization or candidate;
So far the only hopeful speculation about the jurors was that two are lawyers so they might see through legal charades...but most lawyers are Democrats.