What is the source of the phrase "high Crimes and Misdemeanors" come? George Mason, a delegate from Virginia to the Constitutional Convention, suggested it. In English law it mean crimes against government that were committed by public officials. | What is the source of the phrase "high Crimes and Misdemeanors" come? George Mason, a delegate from Virginia to the Constitutional Convention, suggested it. In English law it mean crimes against government that were committed by public officials. |