National interest refers to a sovereign states goals and ambitions, which are taken to be the aim of government. These goals and ambitions can be economic, military, cultural, or otherwise. National interest is a vague and ambiguous term that carries a meaning per the context in which it is used by statesmen and policymakers for justifying the actions of their states. The definition of national interest can vary depending on the country and the political climate. In the United States, national interests include matters of vital interest such as national security, public safety, national economic security, the safe and reliable functioning of critical infrastructure and essential societal functions, foreign relations, and the promotion of democratic values. The national interest of a country is a comparatively long-term constant, subject to change with changing perceptions of the incumbents or the entry of a new lot of policymakers. It is important to have a comprehensive set of national policies for safeguarding the national interest, which should be effective and widely shared aspirations capable of guiding long-term policy formulation cutting across all political divisions in a country.