Final answer:
A legislative measure must be approved by both the Senate and the House before being presented to the President, who can either sign it into law or veto it. Congress can override a presidential veto with a two-thirds supermajority vote in both chambers.
Step-by-step explanation:
Legislative Measure Requiring Presidential Approval
When a legislative measure such as a bill has been approved by both the Senate and the House of Representatives, it must be presented to the President for approval. If the President approves the measure, they will sign it into law. However, if the President disapproves, otherwise known as a presidential veto, they can reject the bill by vetoing it. The bill is then returned to Congress with the President's objections. Congress can override a veto if two-thirds of both the Senate and the House vote in favor of the bill. This requirement of a two-thirds vote is referred to as a supermajority vote.
If the President neither signs nor vetoes the bill within ten days while Congress is in session, the bill automatically becomes law. This process exemplifies the system of checks and balances in the United States government.
It is worth noting that Constitutional amendments proposed by Congress through a joint resolution do not require Presidential approval but must be ratified by the states.