The Paulists originated when a group of Redemptorist priests, led by Fr. Isaac Hecker, left that congregation to form a new society, dedicated especially to outreach to the non-Catholics of the United States. They began their ministry in New York under the sponsorship of Abp. John Hughes.
Paulist Fathers * Catholic Encyclopedia
D. O'Brien, Isaac Hecker: An American Catholic
Diary Isaac T. Hecker, the Diary: Romantic Religion in Ante-Bellum America