Yes, I am sure Holder will. It won't work however. He is going to lose on this one. We should know a lot more in a couple of weeks, when I assume the trial court will deny Holder's motion for a preliminary injunction, staying the force and effect of the law pending final adjudication. One necessary element to obtain a preliminary injunction, is a showing of probability of winning on the merits. Good "luck" with that Holder.
You really think he'll challenge it if he's not sure he'll win?
He might, considering that his boss wants to pull the Latino vote further away from the GOP and into his (and his party's) hands.