Next month, the Supreme Court will hear the case of Greece v. Galloway, about a small town in upstate New York that opens its public meetings with a prayer. Americans United for the Separation of Church and State has been representing two residents of Greece who oppose the practice because the prayers have been overwhelmingly Christian. On my America Weekend show, senior litigation counsel Greg Lipper explained why the practice is unconstitutional (which an appeals court has upheld). Listen to our conversation here.