Tammy Tkach visit Tammy Tkach, wife of GCI president Joseph Tkach, recently visited GCI’s Tucson, Arizona congregation, Grace of God Fellowship. She preached a sermon entitled, “Grace and Holiness.” A potluck meal after the service featured members’ favorite recipes. Left to right: Pastor Ted and Lila Millhuff; Tammy Tkach; Michelle and Pastor Tom Landess.