Which of the following is NOT a tool of U.S. foreign policy?

Political campaigns are not considered a tool of U.S. foreign policy because they primarily pertain to the internal political process and the election of leaders within the United States. Foreign policy tools are specifically related to how a nation interacts with other countries and manages its international relationships.

Diplomacy serves as a primary instrument for negotiating and communicating with other nations to foster peaceful relations and address issues. Military alliances, such as NATO, are used strategically for defense and cooperative security among nations. Trade measures, including tariffs and trade agreements, are vital for economic relations and can influence foreign relations by affecting how countries interact with each other economically.

In contrast, political campaigns focus on candidates' domestic agendas and policies, making them ineffective as direct tools for shaping or directing foreign policy.