To propose a new amendment, what vote is required from both the House and the Senate?

Proposing a new amendment to the Constitution requires a two-thirds vote from both the House of Representatives and the Senate. This high threshold is deliberately set to ensure that only amendments with significant support from both chambers can be advanced. The framers of the Constitution designed this process to protect the integrity of the Constitution and to make it challenging to change its foundational principles without broad consensus.

A simple majority, while sufficient for many legislative matters, is inadequate for constitutional amendments due to the potential for fluctuations in political power and public opinion. Similarly, unanimous consent, which typically applies in specific legislative procedures, is not a requirement for constitutional amendments. A supermajority of 75% is not the official requirement and does not align with the established process outlined in Article V of the Constitution. Thus, the correct answer highlights the necessity for extensive agreement among lawmakers to initiate amendments to the Constitution.