Assessing the initial and subsequent rounds of bilateral negotiations with the United States, Iranian officials have expressed surprise at the rapid pace of diplomatic engagement. This acceleration is primarily ascribed to the limited scope of U.S. demands, the relative inexperience or subject-matter unfamiliarity of American negotiators, a pronounced strategic urgency to secure an agreement, and the personalized and unconventional diplomatic style characteristic of President Donald J. Trump. Nonetheless, the trajectory toward a comprehensive accord remains encumbered by persistent structural and political impediments.