The American Constitution is a very rigid constitution. The process of amendment of the constitution is a difficult one. An amendment becomes a part of the constitution only after clearing two stages. First, the proposal for an amendment has to be initiated and passed either by a 2/3rd majority in both the Houses of the Congress or by a special constitutional convention called by the Congress when asked to do by 2/3rd of all the states legislatures. Secondly, after clearing the first stage, the amendment has to secure ratification either by 3/4th of the several state legislatures or by special conventions in 3/4th states.
