Bernie Sanders has called for a Revolution in American politics. I believe that a case can be made that it might have been more precise if he had called for a Counterrevolution.
Quietly, Republicans started a Revolution, under Reagan, that took over the American grass roots by concentrating on State and local governments, which allowed for voter suppression and gerrymandering that was able to affect national elections, and reached a high point when Republicans were able to effect, what some have called, a coup, which installed George W. Bush as President. The ineptness of that Administration allowed for the Presidency of Obama, which was quickly nullified by the elections of 2010 where Obama's counterrevolution was cut short by Republicans, able to use their grass roots clout, as well as apathy of Democrats, to thwart his major programs.
Historically, top down revolutions, as well as counterrevolutions, just don't work out well. If only we could harness, Bernie's proven skills, to mobilize the people, at the grass roots level, we will be able to cleanse ourselves of the pernicious elements in our society.