Many US politicians have expressed alarm and questioned the mental state of Donald Trump after he issued an expletive-filled threat directed at Iran, while warning of attacks on the country’s energy and transport infrastructure.

In a post on his Truth Social platform, Trump wrote: “Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one, in Iran. There will be nothing like it!!!

The remarks come as his administration moves toward another self-imposed deadline for Iran to reopen the Strait of Hormuz, one of the world’s most critical oil and gas shipping routes.

The passage has remained effectively closed since the US and Israel launched military action against Iran in late February, sending global energy prices to record highs.

Trump has repeatedly set deadlines for Tehran while also directing frustration toward European and NATO allies who have declined to back the war effort or intervene in the Hormuz crisis.

He has even threatened to withdraw the United States from NATO amid the disagreement.

Mehdi Tabatabaei, a senior communications official in the Iranian president’s office, said Tehran would only reopen the strait after receiving compensation for war-related damages through what he described as a “new legal regime” based on transit fees.

He added that Trump’s threats against civilian infrastructure reflected “desperation and anger,” which forced him to resort to “obscenities and nonsense.”

Criticism has also come from within US political circles.

Marjorie Taylor Greene, once a close ally of Trump, said officials in the administration who identify as Christians should “beg forgiveness from God” and intervene in what she described as the president’s “madness.”

In a lengthy post on X, Greene wrote that the conflict stemmed from an “unprovoked war” initiated by the US and Israel.

She argued that Trump’s threats to bomb infrastructure would harm civilians rather than achieve stated goals, adding: “This is not making America great again, this is evil.”

Greene had already broken with Trump last year over earlier strikes on Iran, accusing him of abandoning his “America first” pledge to avoid costly foreign wars.

Senior Democrats also issued strong rebukes.

Senate Minority Leader Chuck Schumer described Trump’s comments as those of “an unhinged madman,” warning that such rhetoric risks alienating allies and escalating potential violations of international law.

Independent senator Bernie Sanders called the statement “dangerous and mentally unbalanced,” urging Congress to act immediately to end the war.

Senator Chris Murphy went further, suggesting discussions around the 25th Amendment, which allows for a president to be declared unfit for office, though such a move remains highly unlikely.

Other lawmakers echoed calls for de-escalation. Representative Ro Khanna said Trump was “cursing out and threatening war crimes” while failing US troops still under fire, urging an immediate ceasefire and negotiations among Iran, Israel and the United States.

Senator Tim Kaine described the president’s language as “embarrassing and juvenile” and warned it could increase risks for American service members.

Representative Jake Auchincloss, a Marine Corps veteran, said Iran’s control over the Strait of Hormuz remained strategically critical, even more so than its nuclear ambitions. “Strategically, this war has been a failure,” he said.