Canada addressed the threat posed by Communist sympathizers in a manner more moderate than in the United States. The United States wished the Canadian government would go further, asking for a purging of trade unions, but the Canadian government left the purge of trade unions to the AFL-CIO. The American officials were especially concerned about the sailors on Great Lakes freight vessels, and, in 1951, Canada added them to those already screened by its secret anti-communist screening program. The Communist Party of Canada had not been outlawed since Section 98 was repealed by Prime Minister Mackenzie King in 1935.