You may have seen this:
Maricopa County Superior Court Judge Dean Fink ruled on Tuesday that a rental-car tax passed by voters in 2000 and targeted at tourists violated the state Constitution because the revenue was being used for the wrong purpose.
The full text of the opinion is here:
As you can see by my title, I predict that the ruling will not just be overturned, but will be overturned on a 5-0 vote. Although Judge Fink seems to have attempted to uphold the state sales (TPT) tax on the purchase of vehicles, he says that the tax associated with renting a vehicle can only be spent on highway funding. I don't think he has successfully distinguished the two and a reading of the Constitution that says sales tax on cars has to be spent on roads would be absurd.