Trump and Pope Leo: Behind their disagreement over Iran war

As tensions over the Iran conflict escalate, Pope Leo XIV and President Donald Trump have engaged in an unprecedented public dispute that highlights their fundamentally different worldviews on war, peace, and leadership.

The two men—one a studious former bishop who spent decades serving in South America, the other a combative politician known for his direct attacks on critics—have found themselves locked in an extraordinary war of words that has captured global attention.

President Trump took to social media this week to call the Pope “weak” and captive to the “Radical Left,” even suggesting that Leo somehow owed his election as pontiff to Trump’s presidency. The pontiff responded firmly while traveling to Africa, saying, “I’m not afraid of the Trump administration or of speaking out loudly about the message of the Gospel, which is what the Church works for.”

The clash represents a remarkable moment in U.S.-Vatican relations—the first time in history both positions are held by Americans, though with dramatically different backgrounds and priorities.

Leo XIV, formerly Cardinal Robert Prevost, has demonstrated his willingness to speak directly on geopolitical issues since before his elevation to the papacy. As a bishop in Peru, he clearly denounced Russia’s 2022 invasion of Ukraine as an “imperialist invasion in which Russia wants to conquer territory for reasons of power given Ukraine’s strategic location.”

Even as a cardinal, the future pope shared criticism of U.S. Vice President JD Vance’s immigration stance, particularly Vance’s suggestion that Christianity establishes a hierarchy of care that places foreigners below family and fellow citizens.

When Leo was elected on May 8, 2025, Trump initially celebrated the historic moment, posting on Truth Social: “Congratulations to Cardinal Robert Francis Prevost, who was just named Pope. It is such an honor to realize that he is the first American Pope. What excitement, and what a Great Honor for our Country.”

However, the relationship quickly soured as Leo’s commitment to peace came into direct conflict with Trump’s escalating rhetoric on Iran. By Monday, Trump was claiming credit for Leo’s election, writing that the Church “put him there because he was an American, and they thought that would be the best way to deal with President Donald J. Trump.”

Vatican observers note this characterization misunderstands both Leo and the College of Cardinals, which has historically been hesitant to elect an American pope precisely because of concerns about U.S. global dominance. Steven Millies, a professor at Chicago’s Catholic Theological Union, described Leo as “the least American of the Americans,” noting his decades of service in South America.

From his first appearance on the balcony of St. Peter’s, Leo has emphasized peace as central to his papacy. His early statements addressed conflicts in Ukraine and Gaza, describing a “third world war in pieces.” Notably, the polyglot pontiff has primarily used Italian and Spanish in his public addresses, rather than English, underscoring his role as leader of a global church rather than an American representative.

The conflict between the two leaders came to a head during Easter, a period of profound significance for Christians worldwide. As Trump escalated threats toward Iran, Leo used his Palm Sunday message to emphasize Jesus as the “King of Peace,” quoting scripture that God “does not listen to the prayers of those who wage war.”

The contrast grew starker when Trump welcomed conservative religious leaders to the White House, where his spiritual adviser Paula White compared him to Jesus as a persecuted figure. Meanwhile in Rome, Leo performed the traditional foot-washing ceremony and directly expressed hope that Trump would seek an “off-ramp” in Iran.

When Trump threatened on Easter to bomb Iran’s civilian infrastructure and eradicate a “whole civilization,” Leo called such threats “truly unacceptable,” finally triggering Trump’s direct attack on the pontiff.

Trump’s response revealed his view of Leo as simply another political opponent, writing, “I don’t want a Pope who criticizes the President of the United States because I’m doing exactly what I was elected, IN A LANDSLIDE, to do.” He added that Leo should “focus on being a Great Pope, not a Politician.”

Leo maintained that his message transcends politics. “To put my message on the same plane as what the president has attempted to do here, I think is not understanding what the message of the Gospel is,” he told The Associated Press while traveling to Algeria. “And I’m sorry to hear that but I will continue on what I believe is the mission of the church in the world today.”

This unusual confrontation places both leaders in uncharted territory. For the papacy, which typically avoids naming specific politicians in its commentary on world affairs, the direct engagement with Trump represents a significant departure from tradition. For Trump, who routinely attacks perceived opponents, this conflict is unique—he faces a global religious leader who neither accepts Trump’s framing nor faces any political pressure to do so.