List America’s prominent evangelical Protestant voices and the Rev. Rick Warren remains near the top, up in the mix with the Rev. Brian McLaren, Bishop T.D. Jakes, Jim Wallis, the Rev. Tim Keller and others.

Many evangelicals, of course, like to argue about who belongs on that list. In recent years, it has become increasingly obvious that the experts are finding it harder to decide who is and who is not an “evangelical” in the first place.