American Protective Association
This is Roald Tweet on Rock Island. Safe in the Vatican, Pope Leo the Thirteenth was probably not aware in the spring of 1887 that a stack of lumber in front of the W. J. Young Lumber Company in Clinton, Iowa, was about to cause him some grief. That lumber was the first domino in a chain of bigotry that got out of hand. A popular Clinton mayor, Arnold Wallicker, had been defeated after refusing to let the lumber company continue to pile its lumber in the street. The company's Irish employees had voted against him, and the Irish were Roman Catholics.
Source: wvik.org