Why can't we get Wisconsin law licenses without taking their bar like Wisconsin law students do?

From the National Law Journal:

A Wisconsin federal judge has granted class status to a group of law school graduates who have earned law degrees outside that state and want the same right as Wisconsin law school graduates to practice in the state before passing a bar exam. However, shortly after granting class status, the Judge also dismissed the case on other grounds.

Christopher Wiesmueller, a graduate of Oklahoma City University School of Law who served as the original plaintiff as well as the lawyer on the case, said in an interview that he will appeal the dismissal to the 7th U.S. Circuit Court of Appeals. Wiesmueller sued on the basis that a rule allowing only graduates of Wisconsin's two law schools to practice law before passing the bar exam was a violation of the U.S. Constitution's commerce clause.

I know at least one of our Law Blog colleagues is licensed in Wisconsin. He, of course, is probably rooting against this lawsuit as it will maintain the exclusivity of his dual licensure. I, on the other hand, am rooting for this lawsuit so that I can add an asterisk to my name on the letterhead without taking another bar exam.

Full article here.