President Donald Trump vowed to impose sweeping economic sanctions on any country that does business with Iran [1, 2].
The move represents a significant escalation in U.S. efforts to isolate Iran. By targeting third-party nations, the administration aims to cripple Iran's financial stability and deter other global powers from providing economic support.
Trump described the upcoming measures as an “economic D-Day” [1]. The administration intends to use these sanctions to pressure Iran over alleged hostile actions and to stop other nations from supporting the Iranian economy [1, 3].
White House Press Secretary Karine Jean-Pierre said the sanctions will cripple any nation that aids Iran’s malign activities [2]. She said the measures could be announced as soon as this week [2]. While some reports suggest implementation may be delayed until later in the month, the administration has signaled a rapid rollout [2].
U.S. officials said the necessity of these sanctions is a response to Iranian actions that they describe as an act of war [1].
In Tehran, officials have rejected the U.S. framing of the situation. Mohammad Bagher Ghalibaf, Speaker of Iran’s Parliament, said the nation will resist any foreign interference and will not be intimidated by economic threats [3].
The announcement was reported on Aug. 21 [1]. The administration has not yet specified which countries are primary targets for the “economic D-Day” measures, though the policy targets any nation maintaining trade ties with the Islamic Republic [1, 2].
“"We will unleash an economic D‑Day on any country that does business with Iran."”
This policy shifts U.S. strategy from primary sanctions—targeting Iran directly—to secondary sanctions, which force third-party countries to choose between trading with Iran or maintaining access to the U.S. financial system. Such a move typically creates diplomatic tension with U.S. allies and trading partners who have independent economic ties to Tehran.
