What does states rights have to do with slavery?

It was, not slavery but the issue of states' rights, of which the slavery issue was the main concern. Slavery was deplorable, but, at the time, the states had the right to choose to be free or slave. Only the states assembled in a Constitutional

if you could provide the poem below, i'd be happy to you!

explanation:

you didn't give us the poem, or the title of the poem. but it is essential for you to give us that, otherwise we can not detect when the poem has a tonal shift!