From Catholic News Agency:
U.S. Vice President JD Vance and Secretary of State Marco Rubio, both of whom are Catholic, will attend the inaugural Mass for Pope Leo XIV, the first U.S.-born pope, on Saturday, May 18.
The Mass is scheduled for 10 a.m. Rome time and will be celebrated in St. Peter’s Square to mark the beginning of Leo’s pontificate. Vance, a convert to the faith, congratulated the Holy Father on his elevation to the papacy in a post on X following the new pope’s election, saying “millions of American Catholics and other Christians will pray for his successful work leading the Church.”