Sullivan has two issues - he is compromised AND he is a true believer. Roberts is just compromised.
If what they had on Roberts was made public, it would lose its power, and the house of cards would come down. Roberts should confess what has been done to him, let the cards fall where they may, and save the republic.
great stuff from Greenwald:
14 May: The Intercept: New Documents from the Sham Prosecution of Gen. Michael Flynn reveal broad corruption in the Russiagate Investigations
by Glenn Greenwald
https://theintercept.com/2020/05/14/new-documents-from-the-sham-prosecution-of-gen-michael-flynn-also-reveal-broad-corruption-in-the-russiagate-investigations/
Roberts - I don’t think he could be bought. Instead, I believe that he was presented with very real and believable (and ongoing) threats to loved ones.
Sullivan - Easily bought for cheap, because he is a true believer. Now must keep going because his purchasers have ordered him to, or they will expose him.
It would be incredibly powerful if Roberts were to do that. I'm sure it would be "inappropriate" for the President and the Chief Justice to "make a deal" but it would save the republic. Roberts spills the beans, Trump pardons him, the world see how the Deep State imposes leverage on people.