The debate emerges as the Archdiocese of Chicago seeks sainthood for the Rev. Augustus Tolton, long hailed in Chicago as the first black clergyman to serve in the U.S. Catholic Church.
A rival for the title is Bishop James Augustine Healy, who was ordained in 1854, the year Tolton was born.
But Healy, the son of an Irish-American landowner and a mixed-race slave, was light-skinned enough to pass as a white man.
And in many cases, he did.