Article Five of the United States Constitution – Wikipedia

Each time the Article V process has been initiated since 1789, the first method for crafting and proposing amendments has been used. All 33 amendments submitted to the states for ratification originated in the Congress. The second method, the convention option, a political tool which Alexander Hamilton (writing in The Federalist No. 85) argued would enable state legislatures to “erect barriers against the encroachments of the national authority”, has yet to be invoked.

When the 1st Congress considered a series of constitutional amendments, it was suggested that the two houses first adopt a resolution indicating that they deemed amendments necessary. This procedure was not used. Instead, both the House and the Senate proceeded directly to consideration of a joint resolution, thereby implying that both bodies deemed amendments to be necessary. Also, when initially proposed by James Madison, the amendments were designed to be interwoven into the relevant sections of the original document. Instead, they were approved by Congress and sent to the states for ratification as supplemental additions (codicils) appended to it. Both these precedents have been followed ever since.

The President has no official function in this process.

The following is the text of Article V:

“The Congress, whenever two thirds of both houses shall deem it necessary, shall propose amendments to this Constitution, or, on the application of the legislatures of two thirds of the several states, shall call a convention for proposing amendments, which, in either case, shall be valid to all intents and purposes, as part of this Constitution, when ratified by the legislatures of three fourths of the several states, or by conventions in three fourths thereof, as the one or the other mode of ratification may be proposed by the Congress; provided that no amendment which may be made prior to the year one thousand eight hundred and eight shall in any manner affect the first and fourth clauses in the ninth section of the first article; and that no state, without its consent, shall be deprived of its equal suffrage in the Senate”