Very interesting. I know that Sadducees dominated the government, sanhedrin, etc., but did they the priesthood as well? Was Ciaphas a Sadducee?
Yes, as was his Father-in-Law Annanias. While i certainly do not believe that all Priests were Saducees, they did control the Chief Priests.
You may recall that Paul was able to use the division between the Pharisees and Saducees to get put into Roman Custody.