Final answer:
Justice Taney's claim in the passage is that Black people were not part of the group considered citizens by the Constitution.
Step-by-step explanation:
The claim made by Justice Taney in this passage is that Black people were not part of the group considered citizens by the Constitution. Taney argues that Black people, whether emancipated or not, were seen as subordinate and inferior, who were subject to the authority of the dominant race and had no rights or privileges unless granted by those in power.
Learn more about Dred Scott v. Sandford