Answer:
1. Dred Scott-- Well..I'm sure the South viewed it as a positive thing. The
North, of course, abhorred it. They began to worry that slavery
was, indeed, legal in the North. They also began to worry that slaves in the South would soon have very few (if any) rights at all.
This case came at a very tender time in the US, as slavery was a
hot topic of all the elections, and a source of major conflict
between the North and South. The rulings of this court case blew
all previous conflicts out of the water, and set forth a new wave
of bitter disagreement.
2. John Brown's raid- Although the raid failed, it inflamed sectional tensions and raised the stakes for the 1860 presidential election. Brown's raid helped make any further accommodation between North and South nearly impossible and thus became an important impetus of the Civil War.