No jury. “Because he was charged with a misdemeanor, she said, he was not entitled to a jury trial”
Unfortunately, the Constitution does not agree and Federal court will reverse this in an instant.
The only legal non jury offense is an "infraction" and can only carry a monetary penalty, with no custodial option (jail time). There are no indictments for infraction level offenses.
Additionally, a Federal civil rights tort will likely result. This won't go the way the prosecutor wants.
Thus neatly avoiding the problem of having to inform a jury of the existence of their nullification power. Since that's the subject of the trial in the first place it would be impossible for a judge to preven the jury from being told about it.
Is the misdemeanor a civil charge, or a criminal one?
If it is a criminal one then the US Constitution’s 6’th Amendment applies: “In *all* criminal prosecutions, the accused shall enjoy the right to a speedy and public trial, by an impartial jury [...]”
If it was a civil charge, then is the fine —or even jail-time which would be spent in employment, IIRC— more than $20?
If that’s the case then the 7th Amendment applies: “In Suits at common law, where the value in controversy shall exceed twenty dollars, the right of trial by jury shall be preserved [...]”