The Ninth Circuit (rolling eyes). Translation, appealed to the SCOTUS.
Remember that the Ninth Circuit rejected a challenge of Arizona’s E-Verify law by refusing to review a decision upholding it. The Ninth Circuit is nothing if not consistently inconsistent.
The Ninth Circuit will consider this law to being a kin to secession and strike it down. Then this case can go to the Supreme Nine (don't ask the Ninth to rehear en banc - waste of time). They will likely grant cert. Then this case will come down to Justice Kennedy (we already know how the other eight will vote).
IF she could she should bypass the 9th.