Pope names veteran Vatican diplomat as ambassador to the US to manage relations with Trump

Pope Leo XIV has appointed Italian Archbishop Gabriele Caccia as the Holy See’s new ambassador to the United States, filling a critical diplomatic position at a time of strained relations between the Vatican and the Trump administration.

The 68-year-old Caccia, currently serving as the Holy See’s ambassador to the United Nations in New York, will replace retiring French-born Cardinal Christophe Pierre, who is stepping down at age 80 from his position as apostolic nuncio in Washington.

Archbishop Caccia brings extensive diplomatic experience to the role, having previously served as the Vatican’s ambassador to Lebanon and the Philippines before his 2019 appointment to the UN. Ordained in Milan in 1983, he also held the important administrative post of “assessor” in the Vatican secretariat of state.

The appointment comes at a particularly delicate moment in Vatican-U.S. relations, with tensions evident on multiple fronts. The Holy See and the Trump administration have clashed repeatedly over immigration policies and the ongoing conflict in Iran, where Pope Leo has expressed “profound concern” about U.S.-Israeli military operations.

Just last Sunday, the pontiff called for a return to diplomacy, stating that weapons only sow “destruction, pain and death.” Earlier this year, in what observers interpreted as criticism of Washington’s actions in Venezuela and its threats regarding Greenland, Leo delivered a major foreign policy address condemning nations that use military force to assert global dominance, saying such actions “completely undermine” peace and the international legal order established after World War II.

The relationship with the United States holds particular significance for the Vatican, as American Catholics rank among the most generous donors to Holy See coffers. This financial support makes the diplomatic relationship especially important for the Vatican’s global operations.

As the first American-born pope in history, Leo XIV understands the complex dynamics of the U.S. Catholic Church. Before his election in 2025, he served for two years as Pope Francis’ point person on bishop nominations. Since becoming pontiff, Leo has emphasized reconciliation and unity within a church that has experienced deep divisions in recent years.

These divisions have been particularly evident in the U.S. Conference of Catholic Bishops, where leadership has often leaned conservative, creating friction with the more progressive priorities established during Pope Francis’ pontificate and continued under Leo XIV.

In a statement reported by Vatican News, Archbishop Caccia expressed both “joy and a sense of trepidation” about his new appointment. “I receive this mission with both joy and a sense of trepidation,” he said, describing his role as one “at the service of communion and peace.” He also noted the significance of his appointment coinciding with the 250th anniversary of U.S. independence.

Archbishop Paul S. Coakley, president of the U.S. Conference of Catholic Bishops, welcomed the appointment, offering the “warmest welcome and our prayerful support” of the American hierarchy.

While the Holy See traditionally maintains diplomatic neutrality, Pope Leo has not hesitated to speak forcefully against humanitarian crises, condemning both Israel’s military actions in Gaza and Russia’s invasion of Ukraine.

Caccia’s appointment signals the Vatican’s commitment to maintaining open dialogue with the United States despite policy differences. Observers note that his experience at the United Nations, where he has navigated complex international relationships, may prove valuable in managing the challenging bilateral relationship at a time of global instability.

The new nuncio will be tasked with representing papal priorities while fostering constructive engagement with both the U.S. government and the American Catholic hierarchy during a period of significant geopolitical tension and domestic polarization.