Actually, on second thought, just who do these parties think they are, telling states when they can and cannot hold elections?
I’d say let the states choose, and if the parties snub them, fine. Then it’s time for reform.
So the states snub the parties, and the parties snub the states, and so on. The states also control who appears on the ballot -- so take this brinksmanship to its absurd end, and come November 08, Florida voters could walk into the booth to choose between the Libertarian and the Green candidates. That is within Florida's rights, but it wouldn't serve -- or be well-received by -- Florida voters.