Summary

Portrait of James Madison James Madison James Madison letter to Robert Walsh (1819)

But some of the States were not only anxious for a Constitutional provision against the introduction of slaves. They had scruples against admitting the term "slaves" into the Instrument. Hence the descriptive phrase, "migration or importation of persons;" the term migration allowing those who were scrupulous of acknowledging expressly a property in human beings, to view imported persons as a species of emigrants, while others might apply the term to foreign malefactors sent or coming into the country.
Source: Wikisource

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