AP Style Question: Are Lutherans Also Christians?

A reporter (or copy editor) with some religion-beat experience would have asked a follow-up question to prevent this strange wording. That question: Is this particular congregation part of the oldline Protestant denomination known as the Christian Church (Disciples of Christ) or is it one of those new nondenominational churches with highly generic names that offer no hints about church history? That’s actually an important question in a legal story of this kind, which could end up involving input from regional Disciples leaders.