This article is an effort to analyze and elucidate the manner in which the United States is represented as the "particular Other" in the foreign relations of the Islamic Republic of Iran, while probing the underlying identity and discursive dynamics latent in the relations between the two countries. The main research question is: How does the image of the United States in the discourse of the Islamic Republic's foreign relations persist from the end of the Cold War to the conclusion of Donald Trump's first presidential term? The research hypothesis posits that the representation of the United States is continuously reproduced through identity and discursive processes. The findings reveal that this representation is the product of historical experiences and identity processes that intertwine domestic and foreign policy. An examination of five historical periods (Reconstruction, Reform, Ahmadinejad, JCPOA, and post-JCPOA) demonstrates that, although in certain periods there exists the possibility of moderating the image of the "Other" as a negotiable counterpart, these approaches prove unstable and are undermined by the pressure of the dominant identity discourse. Furthermore, the nuclear dossier and the JCPOA experience illustrate that the representation of the "Other" persists even under conditions of interaction, swiftly reverting to the narrative of the "treacherous Other." Ultimately, Trump's actions elevate this representation of the United States to its zenith and solidify it. Overall, the article demonstrates that the othering of the United States is a persistent and multi-layered process, which—within the framework of Iver Neumann's "Eastern Path" theory and employing historical research methods—is explicated as a structural component of the Islamic Republic's political identity.