‘Tyranny of the majority?’

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A question:
After reading the Los Alamos Monitor coverage of Council’s  approval of charter review actions, I was struck by the phrase put forward “the tyranny of the majority.”
What could this mean?
I thought that representatives and those desiring to be representatives were there to represent the people of the community.
Could it mean instead they favor the assumed “wisdom” of their own or colleagues is what really matters?
Sounds like an election issue.
Robert A. Nunz
Los Alamos