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The constitution
Twenty-seven amendments have been ratified since the original signing of the Constitution.
Ratification of amendments to the Constitution is a power of the?
Article V of the Constitution provides two methods to propose amendments and two methods for ratification. Constitutional amendment proposals in method one are by joint resolution of the Congress with a 2/3 vote in each house. (This is the only method that has been used.) Method two is by way of petitions to Congress by 2/3 of the states to conduct a convention for proposing amendments, and then holding such a convention. (An Article V convention has never been held). Amendments proposed by either the congressional method or the convention method are then submitted to the states for ratification. There are two possible methods here as well. Ratification can be done by way of the votes of the state legislatures or by specially elected delegates to state ratification conventions. In either case, ratification requires the votes of 3/4 of the states. The convention method was used in the case of the 21st Amendment (repeal of prohibition).
There are two specified mechanisms whereby an amendment to the U.S. Constitution can be proposed. The States can convene a constitutional convention or both houses of Congress can pass an amendment by supermajority and send it to the State legislatures for ratification.
In the US, the legislative branch (Congress) typically votes with a two-thirds majority in both houses to send a proposed constitutional amendment to the states for ratification.
27 amendments
two
Joint Resolutions are used to propose constitutional amendments.
Constitutional amendments are proposed by the Congress.
No President legalized Prohibition. Constitutional amendments do not have anything to do with a President. The 18th amendment, having been approved by vote of the House of Representatives and the Senate, was submitted to the States for ratification. When 3/4ths of the states ratified it, it took effect when the Secretary of State, Frank Polk, certified the ratification. This was on January 29th, 1919. Of course, the amendment itself had a provision that called for it not to take effect until one year after the ratification. Woodrow Wilson was President in 1919. But his approval or disapproval was not relevant, and there was nothing for him to sign.
Congress can propose amendments.