Secretary of State Marco Rubio will hold a private meeting with Pope Leo XIV at the Vatican on Thursday, May 7, 2026, at 11:30 a.m., the Vatican announced, in a diplomatic encounter that has left Vice President JD Vance notably absent from the guest list. The unusual arrangement has ignited speculation about an intensifying power struggle between the two Catholic heavyweights in President Trump’s administration as tensions between the White House and the Holy See reach a boiling point.

Vance, who converted to Catholicism in 2019, had been seen as the administration’s logical representative to the Vatican. His exclusion from the papal audience represents a dramatic break from typical diplomatic practice and is being interpreted as blowback from the pope’s reported refusal to accept Vance’s White House invitation.

Rubio, a devout Catholic who regularly attends Mass, now emerges as the dominant figure in the administration’s Catholic diplomacy efforts. His three-day Rome visit, spanning Wednesday through Friday, also includes sit-downs with Vatican Secretary of State Pietro Parolin and Italian Prime Minister Giorgia Meloni.

Trump’s Blistering Attacks On The Pope

Rubio’s Vatican mission takes place amid extraordinary public hostility between President Trump and Pope Leo XIV, the first American-born pontiff. Trump attacked the pope after Leo called for peace in the Middle East war and declared Trump’s call to destroy Iranian civilization unacceptable, branding the pontiff as “WEAK on crime, and terrible for foreign policy.”

The president doubled down on May 4 during The Hugh Hewitt Show, claiming Leo was “fine” with Iran having a nuclear weapon and charging that he is “endangering a lot of Catholics and a lot of people.” Leo fired back on May 5, urging critics to “do so with the truth,” and categorically rejecting the nuclear accusation: “The Church has spoken out against all nuclear weapons for years, so there is no doubt on that point.”

The pope has also openly condemned Trump’s expansive immigration crackdown, provoking additional presidential anger. Christians worldwide have rallied behind the pontiff following Trump’s verbal assaults, and analysts caution the conflict could exact genuine political damage. Polls conducted in March and April 2026 showed growing disapproval of Trump among American Catholics — a troubling signal for a president who won a majority of Catholic voters in the 2024 election.

The meeting comes one day before Pope Leo marks one year as head of the world’s 1.4 billion Catholics and just weeks after Trump’s withering public criticism, capping a diplomatic tour that underscores the frigid state of relations between Washington and Rome.

Vance Frozen Out Of Papal Talks

The choice to dispatch Rubio without Vance marks a sharp departure from conventional diplomatic norms. With the vice president completely off the guest list, the perceived slight has fed rumors about an escalating rivalry between the two Catholic figures in Trump’s inner circle. As Leo rebuffs Vance’s overtures while granting Rubio the prized private audience, the Cuban-American secretary of state appears to have seized control of the administration’s Vatican diplomacy portfolio.

“Secretary Rubio will meet with Holy See leadership to discuss the situation in the Middle East and mutual interests in the Western Hemisphere,” a State Department spokesperson said in confirming the trip.

Meloni Caught In The Crossfire

Rubio will also sit down with Meloni on Friday morning, a meeting the secretary himself requested, an Italian government source told AFP. The far-right Italian leader has been viewed as one of Trump’s staunchest European allies — but that relationship has deteriorated sharply. President Trump insulted Meloni after she defended the Catholic leader, criticizing her as lacking courage.

Trump has even threatened to pull U.S. troops from Italy, complaining that Rome “has not been of any help to us” in the Iran war. Italian media have characterized this week’s meetings as an effort to “thaw” relations frozen by Trump’s attacks.

“Meetings with Italian counterparts will be focused on shared security interests and strategic alignment,” the State Department said.

Cuba And The Western Hemisphere On The Agenda

Cuba is expected to feature prominently in Vatican discussions alongside the Middle East. The Holy See has long played an active role in diplomacy on the island, and Rubio — a Cuban-American — has been leading the Trump administration’s efforts to intensify pressure on the communist government in Havana. Vatican officials have historically served as quiet brokers in U.S.-Cuba relations, and Rubio’s private audience offers a chance to recalibrate that channel.

For the Vatican, the meeting represents a delicate balancing act: engaging substantively with Washington on global crises while not appearing to capitulate to a White House that has publicly humiliated both the pope and one of Europe’s most prominent Catholic leaders. For Rubio, it is an opportunity to position himself as the indispensable bridge between an angry president and an unyielding pontiff — a role that, until recently, many assumed Vice President Vance would play.

Whether Thursday’s audience produces a genuine thaw or merely papers over deep divisions remains to be seen. But with the vice president sidelined and the secretary of state ascendant, the contours of Trump’s Catholic diplomacy have shifted dramatically — and the rivalry between two of the administration’s most prominent Catholic voices has only intensified.