At 10 a.m. on Wednesday, a constitutional issue returns to the Supreme Court after a three-decade absence: the role that prayer may play in government meetings.  Arguing for the local government in Town of Greece v. Galloway will be Thomas G. Hungar of the Washington office of Gibson, Dunn & Crutcher, with twenty minutes of time.  Supporting the town, at least in part, for the U.S. government as an amicus will be Deputy Solicitor General Ian H. Gershengorn, with ten minutes.  Arguing for the town residents who challenged the prayer practice will be Douglas Laycock of Charlot...