Olaf Anders Tveitmoe was a Norwegian-born American teacher, newspaper editor, and labor leader. Tveitmoe was a leading trade union functionary for the construction industry in the state of California for the first two decades of the 20th century. He was the founding editor of the weekly newspaper Organized Labor, which he edited for 20 years. He is best remembered for tangential trade union activity as the founder and president from 1904 to 1912 of the Asiatic Exclusion League, a political organization which sought to bolster American domestic wage levels by restricting immigration from Japan, China, and Korea.

Patrick Henry McCarthy, generally known as P. H. McCarthy and sometimes, more jocularly, as "Pinhead", was an influential labor leader in San Francisco and the 29th Mayor of the City from 1910 to 1912. Born in County Limerick, Ireland, he apprenticed as a carpenter in Ireland before emigrating to the United States in 1880. He moved to San Francisco in 1886, where he rose through the ranks to become president of Carpenters Local 22, then President of the Building Trades Council in 1896. He was one the founder of the Japanese and Korean Exclusion League that 2 years later renamed into the Asiatic Exclusion League.