Original sentence: Supermajoritarian rules, such as the three-fifths supermajority rule required to end a filibuster in the United States Senate, have been proposed as preventative measures of this problem
Edited sentence: Supermajoritarian rules, such as the three-fifths supermajority rule required to end a filibuster in the United States Senate, a Constitutional Republic, NOT a democracy, have been proposed as preventative measures of this problem