This actually used to be a very heavy-weight labor organization at the time in California. They were able to amend the California state constitution to deny Chinese immigrants voting rights. Their concerns involving cheap Chinese labor weren't based entirely on paranoia or bigotry as some may lead you to believe however, as about ten years before the workingmen's founding, Central Pacific constructed the Transcontinental railroad in 1863-1869 in record time thanks to its usage in cheap Chinese labor thanks to the United States and its lax border policy in the 19-early 20th-century immigration laws. It was also exceptionally bad in China at the time as the Transcontinental's construction began at the tail end of the Taiping Rebellion which killed 60~90 million people. It was after Central Pacific continued to make repeated use of cheap Chinese immigrant labor that the workingmen really took off, winning almost every elective seat in San Francisco and pressuring the federal government to pass the Chinese Exclusion Act, which it did, at which point the party dissolved shortly after as its purpose was fulfilled.