I don't see this standing. How can a state change the rules of a federal election? And what happens when we have fifty different sets of election rules to deal with?
The last time this came up Governor Brown refused to sign it into law.
Because the constitution gives the states absolute power in determining how presidential elections are run.
If California wanted to it could pass a law tomorrow canceling the election entirely and just awarding all its electors to the Democratic nominee. If they can do that why couldn’t they require financials to be on the ballot?