It would be awesome if they would do it on a state level like they are doing it with the Tax Cannabis Act. Like Cali and New York could vote on legalizing immigrants I would be there in a heartbeat lol.
Citizenship is a federal question not a state question. California has no authority to do this--just like it has no authority to legalize weed. The only reason it might get away with the latter is that Obama said he won't strictly enforce federal law on that issue.