The Constitution is difficult to amend because it requires a supermajority of either members of Congress or a supermajority of state legislatures to propose a new amendment for ratification. Even after acquiring the requisite two-thirds of either group to propose the amendment, it then has to be ratified by 75 percent of the states, either by their legislatures or state Constitutional conventions.
而且,修宪的难度如此之大,其实是有意造成如此高难度,以防止有人以此达到政治目的,而将不正确的条文加进宪法。不仅加进去难,拿掉也难。禁酒令就是用了13年才拿掉。
投入讨论的修宪proposals一共有几千;而通过表决的只有33条。这33条中,还有6条尚未正式批准。
美国宪法是立国之灵魂,不是轻易就可以改。一方面,这也在一定程度上保证了无论政坛如何胡闹,美国还是美国。另一方面,事情就不像小朋友们热血一沸腾,就可以大刀阔斧地改革。:)