If you look at American history 43 presidents have been sworn in 220 years or so. American democracy struggles to attain its theoretical principles because of other factors and that is why it is failing. NOt because democracy is inherently an unstable idea. Freemasons, rise of atheism, Zionist power, unregulated banking and capitalist corporations, excessive lobbying influence and other reasons have hijacked american democracy and people's wills has been hindered. Even then democracy is responsible for ensuring the quick turnover of ruling elites, that politicians bend much of their effort to the will of the people and that transparency in government be fundamental. America's success cannot solely be attributed to democracy but democracy had its role to play.