HENDERSONVILLE, Tenn. — The Music City campus of the Trinity Broadcasting Network is about a half-hour drive from Music City itself, in a placid Nashville suburb on a bend in the Cumberland River where the main road through town is called the Johnny Cash Parkway. TBN, America’s largest Christian television network, acquired the complex in 1994 after the death of country singer Conway Twitty, who had operated it as a sprawling tourist attraction he called Twitty City. Last year, TBN renovated Twitty’s personal auditorium, leveling the floor, adding large neon signs and a faux-brick backdrop under the original Corinthian columns. The resulting TV set looks like an urban streetscape framed by a Greek temple.

On a February night, in his large office just above the auditorium, the network’s biggest star is making last-minute plans for what’s shaping up to be a busy evening. First, Mike Huckabee fields some logistics for dinner at his nearby condo, where he will host three couples who won the privilege in a charity auction. He takes a call from the actor Jon Voight, […]