Impeachment appears six times in the U.S. Constitution. The Founders weren't concerned with anything more than with impeachment because they had lived under King George III and had in 1776 accused the king of all the things that George W. Bush wants to do: Usurpation of the power of the people; Being above the law; Criminal abuse of authority.
A humane and generous concern for every individual, his health and his fulfillment, will do more to soothe the savage heart than the fear of state-inflicted death, which chiefly serves to remind us how close we remain to the jungle.
Democracy is just a word. You have to give it meaning. The US is not a democracy. Most Americans do not vote. We haven't had a real choice for a long, long time now. Wealth rules. Corporations rule. The US is a plutocracy - government by wealthy people. Certain people control multinational corporations. You couldn't get elected in the US without lots of money.