Trump praised the pope at the start of Francis's papacy, in 2013. But relations soured during the 2016 election, when Francis criticized Trump's proposal to build a wall on the U.S.-Canada border.

Pope Francis didn’t affirm same-sex marriage or lobby for ordaining women as priests. But he gently steered the Catholic Church in a more progressive direction while leading with compassion, openness and humility.

The pontiff’s death ends a reign that changed the Catholic Church. The process of electing his successor will likely center on whether to continue his progressive legacy.