Anon, CTL is correct. Injunctions and precedents are two completely different things. National injunctions are issued when the defendant is the USA; the Sixth Circuit couldn’t have issued an injunction against New Jersey because it wasn’t a defendant in the case.
However, the law here is not in any serious dispute. The third circuit would have reached the same decision as the sixth, because there really isn’t any other decision to reach. And Police v Newark IS a third circuit decision, which is directly on point.