For your interest, jury nullification has been addressed directly by the Supreme Court in Canada. They reasoned that a judge does indeed has a duty to stop jur

For your interest, jury nullification has been addressed directly by the Supreme Court in Canada. They reasoned that a judge does indeed has a duty to stop jury nullification with proper jury instruction, and by preventing council from raising the prospect of nullification to the jury: > It is no doubt true that juries have a de facto power to disregard the law as stated to the jury by the judge. We cannot enter the jury room. The jury is never called upon to explain the reasons which lie behind a verdict. It may even be true that in some limited circumstances the private decision of a jury to refuse to apply the law will constitute, in the words of a Law Reform Commission of Canada working paper, "the citizen's ultimate protection against oppressive laws and the oppressive enforcement of the law" [...] But recognizing this reality is a far cry from suggesting that counsel may encourage a jury to ignore a law they do not support or to tell a jury that it has a right to do so. But as they noted, they also reasoned that jury nullification is an integral and unavoidable part of the system, and that leaving juries the final say on the verdict, without appeal, is the intended effect, as a firestop against government abuse. They also reasoned there's no way to actually address jury nullification, beyond ensuring that the jury is properly instructed, without effectively getting rid of juries altogether. The Canadian cases cite an unusual amount of American and British non-binding precedent (even for the Canadian courts, which tend to borrow freely from other common law jurisdictions when relevant) for their legal reasoning. The legal logic in the Canadian cases closely follows American rulings on jury nullification in the appellate courts, even though it hasn't gone to SCOTUS. The principles and constitutional rights in question are basically identical. I'd be very surprised if the American Supreme Court didn't issue a carbon copy ruling on the topic.