What must the President obtain to make a treaty with another country?

To successfully make a treaty with another country, the President must obtain a two-thirds vote from the Senate. This requirement is established by Article II, Section 2 of the United States Constitution, which states that the President has the power to negotiate treaties, but those treaties must be ratified by a supermajority in the Senate to take effect. This process ensures that treaties reflect a wider consensus among elected representatives rather than just the decision of the executive branch, thus providing a system of checks and balances.

The requirement for a two-thirds vote in the Senate reflects the framers' intent to make treaty-making a significant bipartisan effort, recognizing the importance of international agreements in shaping U.S. foreign policy. By requiring such a high threshold for approval, the Constitution aims to prevent the executive branch from making unilateral decisions that could have lasting implications for the country.