Iowa has House Study Bill 17 which contains the following language
“The right of an individual to acquire, keep, possess, transport, carry, and use arms to defend life and liberty and for all other legitimate purposes is fundamental and inviolable. Licensure, registration, special taxation, or any other measure that suppresses or discourages the free exercise of this right is forbidden.”
That’s undeniably the strongest language I’ve seen yet. According to the NRA-ILA, the vote was yesterday, so I need to follow up to see if it was gutted or not, but I would love to see that kind of law passed in more and more states.