Iran has dismissed a new U.S. sanctions package as a sign of desperation while the Islamic Revolutionary Guard Corps warned of possible strikes on American interests.

The escalation marks a significant breakdown in diplomatic efforts, as the U.S. attempts to use maximum economic pressure to shift Iranian policy.

Treasury Secretary Scott Bessent said the move was the "opening of an all-out financial assault on the Iranian" economy [1]. The policy, referred to as a "D-Day" sanctions package, targets the Iranian government and various entities that conduct business with the nation [1].

In Tehran, officials rejected the effectiveness of the measures. Foreign Minister Abbas Araghchi said that previous attempts at economic pressure had "failed" [2]. Iranian officials said the new sanctions were "idiotic" and argued that such moves shut the doors of diplomacy [3].

While the diplomatic wing of the government focuses on the failure of economic warfare, the IRGC has adopted a more aggressive tone. The military wing said it could strike American interests in response to the new financial restrictions [4].

Kamran Bokhari said the U.S. had to respond [3]. The Trump administration said tougher sanctions are necessary to pressure Iran over its current policies [1].

Iran continues to argue that years of sanctions have not achieved U.S. objectives and instead signal a lack of viable options for Washington [2].

"opening of an all-out financial assault on the Iranian"

The introduction of 'D-Day' sanctions suggests the U.S. is returning to a maximum-pressure strategy to force concessions. However, the simultaneous warning of military retaliation from the IRGC indicates that economic levers may now be triggering security risks rather than diplomatic openings, increasing the likelihood of direct kinetic confrontation in the region.