I understand that in federal cases, unlike in many state cases, the prosecution can’t make an offer for any specific lower sentence. The judge gets to make that call regardless of what the prosecutor and the defense think might be appropriate. But the main stick is the US Code section defining the particular crime. In the case of seditious conspiracy, the law lists it as: “they shall each be fined under this title or imprisoned not more than twenty years, or both.”
I assume the judge will shave off a fair amount for the plea, but will still feel compelled to ***** slap the defendant as an example. It is possible that the defendant could serve no time. But I wouldn’t bet on that, either. Pure guess; he’s going to get 5 years or more.