Gushee correctly points out the errors in Christian Nationalism, but avoids the term because he dislikes it. He describes it as "authoritarian reactionary Christianity," which I dislike because "reactionary" seems to put them on the defensive justifiably, whereas IMO they haven't been wronged and have nothing to defend themselves for.
His solution to the growing problem is a covenental approach towards society (as in Covenant Theology), nurtured by participation in a Baptist polity. But the covenental approach is decidedly religious in nature and fails to take the atheist into account, other than acknowledging separation of church and state and that "all are equal."