The nominal selectorate - all who can vote
The real selectorate - the people who vote for the winner
The winning coalition - People important to the winner surviving in office
For Hypocrats, there is a HUGE disconnect between the interchangeable/influential and the essential (donors, cabal, DS). The MSM keeps the nonessentials under control.
Rule 1: Keep the winning coalition small. This is accomplished with big, billionaire donors like corporations. The Googles, FBs, and Twits help to keep the nonessentials under control, as well as, being large donors.