This article focuses on the concept of national role, which is defined as the perception of foreign policymakers of the position of their nations in the international system. The main argument of this paper is that Joe Biden, as the 46th President of the United States, offers a new definition of the national role, which is different from Trump's definition. This national role is made up of elements and ideas that are necessary to understand US foreign policy toward other states, including how to deal with Iran. So, the main question of this paper is “what is the new national role that Biden defines for American identity? What are the most important elements that constitute this new national role? and According to these elements, what can we expect from Biden's administration's foreign policy orientation towards Iran? The research findings show that according to the new perception, the most important national role defined by Biden for the United States is: “respected and moral leadership”, a role that has been severely damaged by Trump's isolationist policies and the most important elements that constitute this new national role are: strengthening alliances, especially with Europeans, emphasizing public opinion satisfaction, using all US capabilities in the form of smart power, selective engagement, multilateralism and institutionalism, liberal internationalism, and diplomacy. This article is a descriptive-analytical article using case theory and the method of data collection is based on the existing literature and virtual data.
