Final answer:
The name of the official newspaper for the National Labor Union was The National Labor Tribune.
Step-by-step explanation:
The name of the official newspaper for the National Labor Union was The National Labor Tribune. It was established in 1866 and served as a platform for the union to disseminate information and promote their cause. The newspaper played a crucial role in uniting workers and advocating for their rights through its articles, editorials, and reports.
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