Further, people that worked with Newbold speculated it was because he did not like Rummy's management style (too hands on for his liking). Newbold at the time said he didn't want to put his family through yet another move, which would basically be a guarentee with the 4th star.
I wouldn't care to go to IBM, EXXON, Mobil, GE, Westinghouse
are any other company and I would find many of these know it all generals. But we all know who holds the power as long as there is success in these corporations.
Rumsfeld will be known in history as one of the best military CEO America has ever had.
If I were him I would be very careful who else is lurking in the back ground, there will be others, Hillterbeast has found something to get her canines into for her campaign.