Hmmm. An Investopedia entry that isn't providing a legal definition or the Supreme Court? Who to believe? Who to believe?

If angels were to govern men, neither external nor internal controls on government would be necessary. In framing a government which is to be administered by men over men, the great difficulty lies in this: you must first enable the government to control the governed; and in the next place oblige it to control itself. - Federalist 51