Being respectful here and impressed with your grasp on history. I have to submit there is indeed something preventing our demands.
It is called corruption at the highest levels of government. Thirst for power, greed. Politicians/corporate interest/foreign entities run the show...not the people.
We've lost our republic. Really hate to sound so cynical, but I look around the landscape and see no way to turn our country back to the people through the ballot box.
Even the electoral process has been perverted. Sure, we realize a bone or two now and again. The issue is this country has moved so far to the left that when one speaks of the constitution, freedom, bill of rights...they are perceived as radicals, troublemakers.
A nation that would re-elect...not elect, because mistakes happen, but re-elect a naked communist a second term, the electoral process and demographics appear quite bleak.
Would you not agree?