Taney not only denied that free Black people were American citizens. He also claimed that Black citizens of the states were not entitled to benefit from the Constitution’s privileges and immunities clause. Americans had debated the question for decades, and Taney now bestowed his authority on one side of the argument. A state could confer “the rights of citizens” to whomever it chose “within its own limits,” the chief justice said. But a person who had “all the rights and privileges of a citizen of a State” was not necessarily “a citizen of the United States.” To admit that free Black
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