This very detailed report goes through which states currently have bullying laws, which ones they are proposed in, which have criminal sanctions, and which states have no active movement on the bullying issue. It is both well documented and actively updated. You can see the current version on their website at:
I hope that eventually all states will have check marks next to having a law on the books. While this will not cure the bullying problem, it will add another layer of a method of protection from those being bullied.