Personal ordinariate
If membership by reception of the sacraments of initiation within an ordinariate is open not only to the Catholics mentioned in the 2013 amendment but to others also who have no Anglican background - something on which no express statement has been issued - anyone who has not yet received all three sacraments of initiation may join. This includes non-Christians, those who, in the view of the Catholic Church, do not have valid baptism (such as Mormons), and those who, again in the view of the Catholic Church, have valid baptism but not valid confirmation or Eucharist. Protestants in general are seen as lacking valid confirmation, but the Eastern churches and some Western ones, such as some Old Catholic churches and the Polish National Catholic Church, are recognized as having valid sacraments.
Catholic Church in the United States
The number of Catholics grew from the early 19th century through immigration and the acquisition of the predominantly Catholic former possessions of France, Spain, and Mexico, followed in the mid-19th century by a rapid influx of Irish, German, Italian and Polish immigrants from Europe, making the Catholic Church the largest Christian denomination in the United States. This increase was met by widespread anti-Catholicism in the United States, prejudice and hostility, often resulting in riots and the burning of churches, convents, and seminaries. The Know Nothings, an anti-Catholic nativist movement, was founded in the mid 19th century in an attempt to restrict Catholic immigration, and was later followed by the Order of United American Mechanics, the Ku Klux Klan, the American Protective Association, and the Junior Order of United American Mechanics.