It is a Catholic organization, originally founded in Brazil by a Brazilian man, Prof. Plinio Corrêa de Oliveira (1908-1995).
Their home page says "The American Society for the Defense of Tradition, Family and Property (TFP) is an organization of lay Catholic Americans concerned about the moral crisis shaking the remnants of Christian civilization. Its earliest origins date back to January 1971, when the first TFP members started to group around the publication Crusade for a Christian Civilization. Today, with over 120,000 active members, volunteers and donors, the TFP is on the front lines of the Culture War, peacefully defending the values of tradition, family and private ownership."
TFP is not officially recognized by the Roman Catholic Church.