Donald Trump has attacked Pope Leo XIV over alleged support for Iran’s nuclear weapon. Leo and the Vatican’s record point in the opposite direction—calling for renouncing nuclear weapons and rejecting the arms race.
President Donald Trump escalated his feud with Pope Leo XIV, claiming the pope backs Iran getting a nuclear weapon—an assertion that runs against Leo’s own public statements and the Vatican’s long-running posture on nuclear disarmament.
Trump. speaking repeatedly on Truth Social. characterized Leo as “Weak on Nuclear Weapons” and complained that he doesn’t want “a Pope who thinks it’s OK for Iran to have a Nuclear Weapon.” The comments landed in a moment of heightened U.S.. attention on Iran and the risk that regional tensions could spiral further.. But the pope’s record, as he and his office have presented it publicly, is strikingly different.
Leo has repeatedly framed nuclear threats as morally unacceptable and warned leaders against the logic of escalation.. In a March 5 video message. he prayed for nations to “renounce weapons” and “halt the arms race. ” specifically asking that “the nuclear threat never again dictate the future of humanity.” In the same spirit. a March 8 post on his account urged people to pray for bombs to cease and weapons to fall silent. pairing religious language with a clear desire for de-escalation rather than expansion.
More broadly. Leo’s rhetoric during 2025 has consistently emphasized a “safer world. free from the nuclear threat.” In June 2025 remarks. he appealed for peace between Iran and Israel while arguing that efforts toward nuclear safety should be pursued through “respectful encounter and sincere dialogue.” He also tied rejection of advanced weaponry to a refusal to normalize war. telling audiences that “We must never get used to war. ” and warning that the temptation to rely on “powerful and sophisticated weapons” needs to be rejected.
Those themes matter in Washington because Trump’s comments weren’t just personal—they were positioned as a critique of the pope’s stance on a specific. high-stakes foreign policy scenario: Iran and nuclear weapons.. The clash is more than rhetorical.. When a U.S.. president suggests a major religious leader supports the very outcome the pope has been denouncing. it can muddy public understanding of how faith-based diplomacy and broader ethical objections to nuclear risk are being communicated.
Trump’s latest remarks came after his earlier statements about Iran. including warnings that “a whole civilization will die tonight.” In that context. his April criticisms of Leo—delivered alongside repeated messaging about threats and deterrence—appear designed to underline his view of urgency and pressure.. But the Vatican’s approach has been long anchored in disarmament arguments and concern about catastrophic humanitarian consequences.
The tension also runs into what the U.S.. Catholic hierarchy and Vatican communications have described over time.. The United States Conference of Catholic Bishops reported that Vatican Secretary of State Cardinal Pietro Parolin told Italian media in June 2025 that the Holy See is advocating for nuclear disarmament.. Separate statements attributed to Vatican representatives—including remarks connected to international efforts through multilateral channels—also align with the notion that the Holy See’s diplomatic posture is about elimination of nuclear weapons. not acceptance of their spread.
Even the institutional record points in the same direction: in 2017, the Holy See signed and ratified the U.N.. Treaty on the Prohibition of Nuclear Weapons.. Taken together with Leo’s own messages—on the arms race. the threat of nuclear catastrophe. and the need for dialogue—the implication is clear: Trump’s contention that the pope thinks Iran having a nuclear weapon is acceptable does not match the public positions associated with Leo and the Holy See.
Leo himself responded to Trump’s attacks by saying he has “no fear” in speaking “loudly” about the Gospel and its peace-centered message.. He emphasized that he and the church are not “politicians” making foreign policy in the way others might understand it. while also insisting he will continue speaking out against war. promoting dialogue. and encouraging multilateral relationships among states to find “just solutions.”
For U.S.. politics. the episode is a reminder of how quickly international religious authority can become entangled in partisan and presidential messaging—especially when foreign policy stakes are high.. It also highlights a growing risk: when leaders trade in sweeping claims about what other actors “support. ” the public can be left with a narrative conflict rather than a clear understanding of stated positions.. If the pope is repeatedly urging leaders to abandon “projects of death” and stop the arms race. then the White House’s emphasis on alleged opposite views creates confusion at exactly the time Americans are most attentive to escalation risks.
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