CLAC Blacklist

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It notes "citation needed" after the bit I've put in quotes below, but should this be removed in the meantime? Also, I'm a bit confused as to why this article comes under the US - blacklisting is general enough and shouldn't be linked to a specific country. In the past, lists of union members have been shared or circulated between multiple organizations to prevent hiring of employees who have been critical of management or advocated on behalf of members of their profession. In Canada, CLAC operates such a blacklist.