Pope Leo XIV will receive Secretary of State Marco Rubio on Thursday, May 7 at 11:30 a.m. in the Apostolic Palace — the first high-ranking encounter between the pope and a top Trump administration official since Trump's public attacks on the pope. Rubio will also meet Vatican Secretary of State Cardinal Pietro Parolin and Italian Foreign Minister Antonio Tajani. The trip is widely framed as a damage-control mission after Pope Leo XIV — the first American pope — publicly condemned Trump's Iran war rhetoric in April, and Trump retaliated with a series of attacks calling him "WEAK on Crime, and terrible for Foreign Policy." Three reads on what Rubio is actually trying to accomplish.

1. The Trip Is Real Diplomacy (Rubio, State Department)

The U.S. cannot afford a public feud with the first American pope, and Rubio is the obvious person to thaw it — a practicing Catholic who already has a relationship with Pope Leo.

Sending Rubio is not a cold call. The May 7 meeting will be his second with Pope Leo; the first was a joint audience with Vice President JD Vance the day after Pope Leo's Inauguration Mass in May 2025. Both Rubio and Vance are practicing Catholics, which gives them a faith-based common ground that Trump himself does not share. From the State Department's view, sending Rubio is sending the most credentialed envoy the administration has on Catholic affairs.

He'll do more than meet the Pope. Rubio's trip also includes meetings with Cardinal Pietro Parolin, the Vatican's Secretary of State, and Italian Foreign Minister Antonio Tajani. Italy's Giorgia Meloni was originally one of Trump's closest European allies, and the Iran war has strained that, too. The visit reads as a coordinated push to repair both Vatican and Italian relations at the same trip.

The diplomatic logic is straightforward. A public stand-off between the U.S. and the world's first American pope — one who speaks for the Catholic Church on global moral questions — is not a fight a State Department can let run. Rubio's Catholic credentials and the prior Vance-led audience make him the only viable channel for repair. The trip is about turning down the volume, even if the substantive disagreement on Iran isn't going to resolve in one meeting.

2. The Pope Won't Fold (the Vatican view)

Pope Leo has spent the last month escalating his criticism of the Iran war, said publicly he has "no fear" of Trump, and built his pontificate around speaking against war and inequality. Rubio is not going to rewrite that.

The papal anti-war language has gotten sharper, not softer. Pope Leo called Trump's threat that "a whole civilization will die tonight" over Iran "truly unacceptable." He described the U.S.-Israeli war on Iran as fueled by a "delusion of omnipotence" and demanded leaders stop and negotiate peace. He has condemned a "handful of tyrants" spending billions on war while millions face poverty. Each of those statements escalated the previous one.

The on-record response from the Vatican was a refusal, not a softening. Speaking to reporters at the start of an African tour after Trump's first attack, Pope Leo said: "I have no fear of the Trump administration or speaking out loudly of the message of the Gospel, which is what I believe I am here to do, what the church is here to do." The Vatican's response to Trump's Truth Social posts — via Father Antonio Spadaro — was that they reflected Trump's "impotence" and that "When political power turns against a moral voice, it is often because it cannot contain it."

This position is the Pope's primary identity. Pope Leo picked it in reference to Leo XIII (1878-1903), the pope of Catholic social teaching, with a focus on workers, war, and inequality. From the Vatican view, Rubio is meeting a pope whose entire pontificate is built around saying the things Trump objects to. The substance won't shift; only the temperature might.

3. By The By, Trump Hasn't Signed Off On Any Of This (the boss-knife dynamic)

Rubio is heading to Rome to repair a relationship his boss is still publicly wrecking. The mission's biggest obstacle isn't the Pope — it's the president.

The attacks from the president himself have been continuous, not episodic. Trump has called Pope Leo "WEAK on Crime, and terrible for Foreign Policy" and said: "We don't like a pope that's going to say that it's OK to have a nuclear weapon." He has also publicly questioned the legitimacy of Leo's election, claiming the pope "wasn't on any list to be Pope, and was only put there by the Church because he was an American, and they thought that would be the best way to deal with President Donald J. Trump." None of that is the language of an administration setting up a successful diplomatic reset.

The trip is happening in a week when Rubio's MAGA cred is questioned. Tucker Carlson's NYT interview reignited the longstanding question of whether Rubio or Vance is the favored heir apparent, with Carlson defending Vance personally. A successful Vatican thaw would strengthen Rubio's hand inside the administration.

Where This Lands

The diplomatic case for Rubio's trip is strong: a Catholic Secretary of State with prior access to Pope Leo is the right messenger to keep this from getting worse, even if it can't get fundamentally better. The Vatican view is also strong: this pope has not shown any interest in softening his Iran-war message, and Rubio is meeting someone whose pontificate is built around saying inconvenient things about war and wealth. Meanwhile, Trump has publicly attacked the Pope's legitimacy and has given no sign of backing down.

Sources