A high-stakes diplomatic mission is set to unfold this week, as U.S. Secretary of State Marco Rubio travels to Rome and Vatican City to defuse rapidly escalating friction between President Donald Trump and the first American-born pontiff, Pope Leo XIV, rooted in deep disagreements over the Trump administration’s Iran war policy. The State Department officially confirmed Rubio’s itinerary on Monday, noting that the trip, scheduled for Thursday and Friday, marks the Catholic secretary’s third official visit to Italy or the Holy See since he took office as the Republican administration’s top diplomat. Vatican officials have publicly confirmed that Rubio will hold a one-on-one meeting with Pope Leo on Thursday.
According to a formal statement from the State Department, the core agenda for Rubio’s discussions with Holy See leadership will center on the volatile security situation across the Middle East, alongside overlapping policy priorities for the U.S. and the Vatican in the Western Hemisphere. Separate meetings with Italian government counterparts, the statement added, will focus on collaborative security objectives and continued strategic alignment between the two NATO allies.
The diplomatic outreach comes at a moment of open public friction between the sitting U.S. president and the pope. Tensions first flared last month, when Trump issued a scathing social media rebuke of Pope Leo, accusing the pontiff of being soft on transnational crime and terrorism over Leo’s public criticism of the administration’s hardline immigration and deportation policies, as well as its ongoing military campaign in Iran. In response, the Pope delivered a widely interpreted rebuke, stating that God does not hear the prayers of leaders who choose to wage aggressive war. The exchange escalated dramatically when Trump shared a now-deleted social media graphic that depicted him in the likeness of Jesus Christ.
To date, Trump has rejected repeated calls to apologize for the controversial post, offering a shifting explanation that he initially believed the image portrayed him as a medical professional rather than a Christ figure. The friction between the White House and the Vatican has already spilled beyond religious and diplomatic circles, seeping into Italian domestic politics: Prime Minister Giorgia Meloni, a longstanding ally of Trump, has publicly condemned the president’s comments about the pope. In turn, Trump has lashed out at Meloni, part of a broader growing frustration with NATO allies that he accuses of failing to provide sufficient support for the Iran war. That frustration has already translated into policy, with the Pentagon announcing plans to withdraw thousands of U.S. troops from Germany in the coming months.
This is far from the first time Rubio has been tapped to clean up after Trump’s provocative rhetoric: the secretary has repeatedly been tasked with walking back or softening the president’s harsh public statements on European relations, NATO and Middle East policy. Beyond the international diplomatic ramifications, the high-profile dispute with the pope carries notable domestic political stakes for the Republican Party, as the U.S. approaches upcoming midterm congressional elections.
Pope Leo has sought to frame his own comments as non-partisan, saying his public calls for peace and criticism of the Iran war and other global conflicts were not intended as a direct attack on Trump or any other political leader. Prior to this week’s trip, Rubio has made two official visits to Italy as Secretary of State. His first trip, in May 2025, included attendance at Pope Leo’s inaugural mass and a private audience with the pontiff alongside Vice President JD Vance. His second visit, in February, again paired with Vance, for the opening ceremony of the Milan Winter Olympics, where the pair met with U.S. Olympic athletes. This story has been corrected to confirm that this week’s trip will bring Rubio’s total number of official visits to Italy or the Vatican to at least three.