While DU-folks' "definition" of a "right-wing" news/commentary source is that it doesn't parrot, unquestioned and unqualified, the current Lib/Prog narrative while eschewing anything R or conservative, there is nothing right-wing or conservative of mooshy-middle about Shuster. He may or may not support The SHREW, but he's a Prog. Shuster is Progs' monkey performing in Progs' circus.
I can't imagine the D Party bigwigs not having (or having had) an "Oh, crap, what if!" meeting. If D Party rules don't already spell out what should happen under what circumstances.