Which part of government must approve a treaty negotiated by the President?

The Senate must approve a treaty negotiated by the President as part of the checks and balances established by the U.S. Constitution. According to Article II, Section 2, the President has the authority to negotiate treaties with foreign nations, but these treaties must receive a two-thirds majority vote from the Senate before they can be ratified and become legally binding. This process ensures that the treaty reflects a broader consensus within the legislative branch, thereby safeguarding the nation's interests and providing a mechanism for oversight of the executive's foreign policy decisions.

The House of Representatives does not play a role in treaty approval, as their responsibilities are primarily focused on legislation related to revenue and other bills. The Supreme Court also does not have a direct role in the approval of treaties, as its function is to interpret laws and adjudicate disputes. While the Cabinet may advise the President during treaty negotiations, they do not have the authority to approve treaties themselves.