The literary device that Gordimer employs in the excerpt is Imagery.
Imagery is a literary device used to represent objects, actions, and ideas in such a way that it appeals to our physical senses. Usually it is thought that imagery makes use of particular words that create visual representation of ideas in our minds.
driven by economic ambitions and a sense that the United States was “destined” to span the entire continent, the war also raised the issue of how acquisition of such a large territory would affect the balance between slave and free states.
Answer: the plan called for a legislature to be divided into two bodies (the senate and the house of representatives) with proportional representation. each state based of its population.