How did Dred Scott Case challenge state rights

I need help ASAP PLEASE. thank you :)

was a decade-long fight for freedom by a black slave named Dred Scott. The case persisted through several courts and ultimately reached the U.S. Supreme Court, whose decision incensed abolitionists, gave momentum to the anti-slavery movement and served as a stepping stone to the Civil War

having lived in a free state and territory did not entitle a slave, Dred Scott Scott was not a citizen and could not sue because he was a slave

Explanation:

the american colonists were happy with their vicorty, but the french were mad and the french and indians were not alies, and neither were the french and colonist. i think,

google it

explanation: