In the 230 years since the constitution was ratified it has been overthrown zero times
Depending on who you ask, it's been overthrown several times - the Civil War, the Federal Reserve, the New Deal, and the Civil Rights Movement all fundamentally changed the model of Jeffersonian aristocracy our founders originally envisioned.
Depending on who you ask, it's been overthrown several times - the Civil War, the Federal Reserve, the New Deal, and the Civil Rights Movement all fundamentally changed the model of Jeffersonian aristocracy our founders originally envisioned.