Respuesta :
Answer:
He uses a previous status of African Americans as evidence.
Explanation:
This is the main reason why Justice Taney's argument is ineffective. In this passage, Justice Taney talks about the status of African Americans. The judge wants to establish what the status of African Americans is according to the Constitution, and from this, derive the rights and privileges that African Americans should enjoy. This is ineffective as it relies on a previous status of African Americans as evidence, instead of a present one.
The reason why Justice Taney's argument was ineffective was that He uses a previous status of African Americans as evidence.
What did Justice Taney do?
In Dred Scott v. Sandford, Justice Taney used the fact that African Americans were once entirely enslaved to base his argument against granting citizenship to African Americans.
This was ineffective because African Americans were no longer entirely enslaved and could be free which meant that they could also assume citizenship rights.
Find out more on the Dred Scott case at https://brainly.com/question/915345.