Ah, thank you for asking for clarification. I did not say that a Catholic can not be evangelical, I said a Catholic cannot be Evangelical. According to Wheaton College, Evangelicalism is a wide-reaching definitional “canopy” that covers a diverse number of Protestant traditions, denominations, organizations, and churches
(source)). I see how it can be tricky when the name of a religious tradition is a word that is also an adjective that can be applied to those who do not belong to their denonination. For instance, the Catholic Church has an “episcopate” and is there for “episcopalian” but there is also a denomination call Episcopalianism. How would the OP’s question, which refers specifically to ecumenism, make sense if we were not talking about Evangelicalism, the denomination?