FWIW, the Nevada case did not declare an amendment to the state constitution unconstitutional, as is often reported. We did an analysis of this on a thread a month or two ago,
Rather, what it did was to (a) find that the provisions of two sections of the state constitution, as amended, did in fact conflict as claimed, and (b) interpret the state constitution to rectify the conflict, as is its bounden duty under the laws under which it was established. To wit, there is an affirmative constitutional mandate that the public schools be adequately funded (by state funds) in Nevada. The legislature was unable to provide adequate funding in the budget it adopted without raising taxes. Anorther constitutional mandate requires that a 60% supermajority pass any tax increase. The court decided that (a) the legislature must fund the schools, that being their duty under the constitution. If they choose to do so by not raising taxes and cutting other programs to free up the necessary funds, fine. But (b) there being an affirmative duty to adequately fund the schools, if they cannot agree to cut other programs to do so within the available funds from current taxes, they are free to pass a tax increase by a 50%+1 vote, said increased taxes being devoted to the school system funding.
The logic was that the specific supersedes the general. While in general the legislature is prohibited from increasing taxes by other than a supermajority, they are not free to ignore a constitutional mandate that they are required to honor because they cannot agree (party representation being almost equal) on how to fund it. They are therefore entitled, by a normal majority, to increase taxes for this one particular constitutionally mandated purpose without the other (supermajority) requirement coming into play.
Note that this was in essence an example of judicial self-restraint. Rather than taking it upon itself to make the budget comply with both constitutional provisions simultaneously by mandating program cuts, it resolved the constitutional question with which it was faced and handed the problem back to the legislature, with a constitutional-law guideline as to what might be done to solve the problem.
That the resolution of the problem is likely to result in increased taxes is owing to stubborn legislators, not to the court.
Minor amplification on Jodi’s post: It’s my understanding that when a case can both be resolved under state law and presents a federal question, a decision based independently on state law and a resolution of the federal question cannot be appealed to the federal system. E.g., Smith alleges that his First Amendment rights have been violated, but also that his freedom of speech rights under the State Bill of Rights were violated. The court finds that in fact his rights under both were violated, but in a very minimal way, awards him $1 in damages, and closes the case. That verdict is upheld throughout the state system. No appeal to the federal system is possible, because the case was resolved by reference to the state Bill of Rights in a way conformable to the federal question.