Like what? SCOTUS said "no."
I guess the Party could reincorporate. What I don't know is if GOP organizations can file suit within their States without coming under the consent decree. I would assume State AGs can bring criminal charges. I don't know about the DOJ but I would assume they can too.
Seems to me you are right that state republican groups could.
"...State AGs can bring criminal charges"
Sounds reasonable.
The DOJ? Not likely, Holder has made "his people" a protected class.