Question

How did legislation affect slavery? How did legislation affect Westward Expansion in this context?

Answer 1

The westward expansion carried slavery down into the Southwest, into Mississippi, Alabama, crossing the Mississippi River into Louisiana.

Answer 2

The westward expansion carried slavery down into the Southwest, into Mississippi, Alabama, crossing the Mississippi River into Louisiana. Finally, by the 1840's, it was pouring into Texas. ... So that it was slavery itself which made the progress of civilization possible.