Was Donald Trump 'blocked' from using the nuclear codes against Iran?

 

Was Donald Trump 'blocked' from using the nuclear codes against Iran?

Reports that Donald Trump was "blocked" from using nuclear codes against Iran refer to unverified claims circulating in April 2026, though they may also be confused with historically documented concerns from the end of his first term in January 2021.

 

Recent 2026 Allegations (Unverified)

As of April 2026, viral reports based on claims by a retired CIA analyst, Larry Johnson, allege that President Trump attempted to access nuclear codes during an emergency meeting regarding Iran but was stopped by a senior military official, identified as General Dan Caine.

 

The Claim: Johnson alleged that a "heated confrontation" occurred where General Caine refused the request by invoking military law (specifically the UCMJ) to prevent what he viewed as an unlawful escalation.

Official Status: The White House has denied these claims, and fact-checkers have noted there is no credible or verified evidence that such a meeting or confrontation took place.

Context: These rumors emerged amid ongoing US-Israeli airstrikes on Iranian targets and a tense temporary ceasefire.

 

Historical 2021 Concerns (Documented)

The concept of "blocking" Trump from nuclear authority first gained major attention in January 2021, following the Capitol riot.

 

Nancy Pelosi's Request: House Speaker Nancy Pelosi contacted General Mark Milley, then Chairman of the Joint Chiefs of Staff, to discuss precautions to prevent an "unstable president" from initiating military hostilities or accessing launch codes.

General Milley’s Actions: According to reports in the book Peril by Bob Woodward and Robert Costa, Milley took "secret action" by instructing senior military officers that he must be involved in any discussion of a nuclear launch. While Milley could not legally "block" a president—as the president has sole authority—he aimed to ensure the established process (which includes consultation) was followed.

 

Nuclear Authority Facts

Legally, the U.S. President has sole authority to authorize the use of nuclear weapons. While military leaders are required to follow lawful orders, they are duty-bound to refuse an order that is clearly unlawful under the laws of armed conflict.