Final answer:
The Dred Scott v. Sandford case emphasized the exclusion of African Americans from citizenship and legal rights under Chief Justice Taney's ruling.
Explanation:
Chief Justice Taney's statement in the Dred Scott v. Sandford case that African Americans could not be citizens affected their legal standing and rights significantly. The ruling highlighted that enslaved individuals were not considered citizens under the Constitution, leading to a lack of rights and liberties. Taney's argument about the subordinate status of Black people exemplifies the deep-rooted discrimination present in American legal history.
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