[Lady Heron]

Was it an official Q theory that Mueller was secretly a White Hat, or was that put forward by interpreters of Q?

No, it was not Q but other's theory that Mueller was a white Hat or at least a Grey one once offered an out. The anon that pushed that theory was Mega Anon.

[Billyv]

Q said RR and MEULLER are one and the same, either both white hats or both black hats.

I vote 188% black hats. MAGA!