The problem is that the word "catholic" had become a partisan word for the highest of the High Church Anglicans and Episcopalians long before the St. Louis Congress. If, in fact, the name of my jurisdiction, "The Anglican Catholic Church," simply invokes that partisan division in some minds, let me be clear that it has no such meaning to me. I am not an Anglo-Catholic, even though I can do very High Church liturgy as well as the next priest. I can also do Low Church liturgy as well as the next priest, and it really is all the same to me. It is the same Lord, it is the same sacrament, and it is the same theology - at least it was written that way and should be so understood.
All my life long, growing up in the Episcopal Church from the late 1950s, and starting to learn in the 1960s, I knew I belonged to "the Holy Catholic Church." As an Episcopalian who knew only one edition, in those days, of the Book of Common Prayer, I was taught that we are both Catholic and Protestant, that we have the Apostolic Succession of Bishops, that only a priest is authorized to celebrate the service of Holy Communion, etc. That was the authorized and official teaching we all shared in the Anglican Communion.
In those decades, in Ellicott City Maryland, the High Church people went to St. Peter's (the House of Commons, as it was jokingly called), and the Low Church people went to St. John's (or the House of Lords, as it was jokingly called). Growing up in the 1930s, my mother remembers being taken to both at different times. She preferred the High Church worship, right down to the Last Gospel. My father was raised Low Church in Towson, Maryland, and lived next door to Trinity Church which his family attended. I grew up understanding that it was all, High and Low, essentially the same.
We did not "aspire" to be Catholic, because we belonged to the same Church that Christ established through the Apostles. Others, the Church of Rome (not the Eastern Orthodox, because our relations with them were different before 1976) may not have appreciated our place in the Church; but we knew who we were anyway. Protestants also criticized us for being "too catholic" for having the Apostolic Succession and a priesthood celebrating at an altar, etc.; but we just prayed for them.
The Creeds teach us that the Church is Catholic, and that our Trinitarian Faith is Catholic. That means, as I said: