How Joe Biden is navigating a Catholic Church in conflict

Catholic voters, like the rest of the U.S., are increasingly polarized around issues like abortion – creating a challenge for Mr. Biden, the nation’s second Catholic president.

Every weekend, almost without fail, President Joe Biden goes to church. If he’s in Washington, he attends Mass at Holy Trinity Catholic Church in Georgetown. If he’s at home in Wilmington, Delaware, he goes to his family parish, St. Joseph on the Brandywine.

In his victory speech last November, President-elect Biden cited the popular Roman Catholic hymn “On Eagle’s Wings,” and in his...