Pope Francis has died at 88, and speculation is already swirling around who will become the next pontiff to lead the Catholic Church.

Francis died in the early hours of April 21, the day after Easter. He had been hospitalized in Rome recently and was diagnosed with pneumonia in both lungs, but in recent days he had appeared in public. Francis was elected pope in March 2013 after Pope Benedict XVI made the unexpected decision to step down from the chair of Saint Peter, becoming the first pope to resign in nearly 600 years.

Several cardinals are considered potential successors to Francis — here are just a few.

Cardinal Raymond Burke, 76, is one of the few potential successors from the United States.

From Wisconsin, Burke has been outspoken in his criticism of the Church’s more liberal language under Francis, and he has strongly supported the Latin Mass, the older form of the Mass that is popular with many conservative Catholics. Burke has also said that Catholic politicians who support legal abortion, like former President Joe Biden, should not receive the Eucharist.

A hardline cardinal from Wisconsin who is a fan of President Donald Trump and who battled Pope Francis could be the first pope from the United States.

The Daily Mail reported that Cardinal Raymond Leo Burke, 76, is being touted as one of the leaders in the race to replace Francis.

Pope Francis died on Easter Monday. A successor as pontiff will be chosen during a future conclave of Catholic cardinals in Rome.

Should Burke be elected, he would be the first American pope ever.

Burke is the de factor leader of church conservatives and battled Pope Francis’ more progressive efforts with regard to LGBTQ+ people and abortion.

Francis stripped Burke of his role as head of the Catholic courts, which chooses ecclesiastical judges, and took away the Wisconsin-born cardinal’s free apartment in Rome.