It would seem to me a "Sola Scriptura Caucus" is not without merit. It would pertain to a good many Protestants (not all) that believes we go by scripture only. Hence, if the scriptures state something, it would be against caucus rules to say Pastor XXX "thinks..." or Father So-n-So "believes..." One may introduce a commentary view of the passage in question but only if it help further the interpretation. There are a good many passages of scriptures worth exploring without interjecting individual view points.
And one might ask what is wrong with a "White" caucus when we have a "Black" caucus. Of course, that is the conservative coming out in me.
Now all that being said, I guess I'm violating this caucus as I'm not whining. Or perhaps I just did. ;O)