Though most of their complaints did not result in changes, a couple did. Mason succeeded in adding "high crimes and misdemeanors" to the impeachment clause. Gerry also convinced the convention to include a second method for ratification of amendments. The report out of the Committee of Detail had included only one mechanism for constitutional amendment that required two-thirds of the states to ask Congress to convene a convention for consideration of amendments. Upon Gerry's urging, the Convention added back the Virginia Plan's original method whereby Congress would propose amendments that the states would then ratify. All amendments to the Constitution, save the 21st amendment, have been made through this latter method.