My conjecture.
Potus/SoS combo needs to be good buy bad guy to the world. We know Trump will be the bad guy.
Trump obviously has some type of disdain for patronage. He will simply pick the best SoS he can that can help him move the line forward.
So even the most fervent of his supporters, aren’t given cart blanc to choose their cabinet positions. This is why we might end up with Romney as SoS — providing Trump can believe that he’s going to present Trumps ideas and not Romney’s or the Globunists.
Trump needs a pit bull AG who has an FBI director willing to work closely together to set our laws straight and in force.
So Rudy may want SoS all day long, but it’s clear he’s top contender for AG and may not even be a consideration for SoS.
I am not sure Rudy is going to get a significant gig. He is quite capable IN THE PAST of AG or SOS. There is some concern about his physical and mental health in some circles. It may just be talk. Of course, he may be fit as a fiddle. We don’t know.
Then there is getting him approved through Congress.
The AG slot has already been filled. Rudy didn’t get it.