Who was responsible for persuading the pope regarding union involvement for Catholics?

Terrence V. Powderly played a crucial role as a labor leader and president of the Knights of Labor, the first significant labor organization in the United States. He was influential in advocating for the rights of workers and was known for his efforts to promote inclusivity within labor movements, including outreach to various ethnic and religious groups, such as Catholics. During his tenure, he worked to ensure that the union movement would resonate with Catholic workers, which included discussions at higher levels, like influencing the pope about the importance of labor rights and union involvement. His initiatives aimed to bridge the gap between Catholic teachings and the benefits of union representation for workers, making him a key figure in this context.