How did President Truman guard against communist spies in AmericaK he set up immigration quotas on all people from Eastern Europe be he made all kind meanest related activities illegal in the United States see he ordered the investigation of government workers to determine their loyalty de he set up a committee committee by Joseph McCarthy to investigate communist activities on American soil I stay in big investigation of all American government workers

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I'll check your answer IF you repost it using standard capitalization and punctuation.