The US Constitution, drafted in 1787 and in effect since 1789, it is the highest law in the United States, since every law in the US has to abide by the guidelines set out in the Constitution. Designed as a way to outline the way the government functions, it has been manipulated, changed, enhanced, and upgraded throughout its lifetime of 229 years. Unlike regular laws, however, these changes to the Constitution are much more difficult to come across.

First, a new amendment has to be proposed in either the House of Representatives or the Senate by a member of those bodies. The amendment is then referred to a committee, where, if it is approved, albeit heavily edited and revised from when it was first proposed, it will then be passed to a floor vote. If two-thirds of the house votes in favor of the amendment, it is then sent to the other house and go through the same process. If the two versions come out and they're different in any way, another committee, made up of members of both houses, has to reconcile the differences, and then the new version is sent to both houses for a vote. Again, both houses must give a two-thirds majority (290 in the House, 67 in the Senate), and if both do, it is then sent to the states, where three-fourths of them (38 as of 2018) have to also approve them in their state legislatures. Only then does an amendment become official. In total, this entire process has reached the state legislature stage 33 times, and in 27 of those times the necessary number of states for ratification has been achieved.