It is a common tactic to claim support for something popular when you know it can't pass.
Last I checked, the Democrats are in charge of virtually all of the cities where this is happening, as well as most of the states. No reason this can't get done at the state and local levels.
If QI was a law, the supremacy clause would certainly apply.
But QI is not a law, however it is a policy created by the courts based on federal law. It’s not clear to me whether the supremacy clause applies here, but I suspect it does.
Last I checked, the Democrats are in charge of virtually all of the cities where this is happening, as well as most of the states. No reason this can't get done at the state and local levels.