Whether she sues USDA or not, I'll wager Agriculture Sec. Vilsack announces his 'retirement' before years end. Wouldn't surprise me at all to see her fill his shoes. Probably be an improvement too.
I don't think so. She's proven to be a distraction to Øbongo's agenda and will always pose a continued hazard. She doesn't bring anything of particular value to Øbongo's table and she doesn't hold anything over his head so there is little motivation - positive or negative - that she can contribute.
As for replacing vilsack - I have no doubt a untrained seal could do a better job than he is capable of doing. I just don't see sherrod doing it.