Claims made using superlative language can be convincing to some, while to others they are the mark of the snake oil salesman. It's the old story of don't believe what you know, believe what I say.
Democracy is becoming something of a dirty word among Christian conservatives, who would put their trust in the future of America as a theocracy. They are getting closer to achieving that goal in recent actions by certain courts. This attitude is becoming also a major platform plank of the Republican party.
Democracy has had a rough ride here in the U.S. In the hundred years from World War I to today, it has increased and declined. The misgivings that H.L. Mencken had about the workings of democracy as he saw it 50 years after the Civil War are still with us today.
Mark Twain had no trust or love for majority rule, but since our country is supposedly democratic, how does that mistrust of majority rule align with what kind of country the US wants to be? There's a lot of anti-democratic feelings boiling up in the country now.