Final answer:
The U.S. Constitution can be amended through a two-step process, involving proposal and ratification. Amendments are typically proposed by a two-thirds Congressional vote or by a convention called by two-thirds of the states, and ratified by three-fourths of state legislatures or state conventions.
Step-by-step explanation:
Constitutional Amendment Process
The process of amending the Constitution is a formal method that follows specific steps outlined in Article V of the U.S. Constitution. It begins with the proposal stage and is followed by the ratification stage. To date, the Constitution has been amended twenty-seven times.
Step 1 - Proposing an Amendment
Option 1: Congressional Proposal - An amendment can be proposed by a two-thirds vote in both the House of Representatives and the Senate. This has been the most common method for proposing amendments.
Option 2: State-Initiated Convention - In this less common approach, two-thirds of the states can call for a convention to discuss and propose an amendment.
Step 2 - Ratifying an Amendment
Option 1: State Legislatures - To ratify an amendment, three-fourths of the state legislatures must agree to adopt it. This method has been used for almost all of the amendments to date.
Option 2: State Conventions - Alternatively, three-fourths of state-ratifying conventions can agree to ratify the amendment. This process has been used only once, to repeal Prohibition with the 21st Amendment.