Barker has appeared on dozens of national television and radio programs to discuss and debate issues related to atheism and the separation of state and church. He has discussed nativity scenes on government property, the campaign against a Mother Teresa stamp, prayer in public schools, and has appeared on "Oprah Winfrey", "The O’Reilly Factor", "Tucker Carlson", "Laura Ingraham", "Phil Donahue", "Hannity & Colmes", "Maury Povich", "Good Morning America", "Sally Jessy Raphael", and "Tom Leykis", as well as many international television and radio shows.