While western pioneers were changing and being changed by the lands to which they migrated, expansion itself was bringing great pressure to bear on the nation's political .and economic institutions Most people in the East began to entertain the expectation that the United States would soon encompass all of North America, but there was significant disagreement about what sorts of institutions should be planted in the new territories. Southerners viewed manifest destiny as a campaign to spread cotton agriculture. Northerners were equally convinced that a diversified entrepreneurial economy was the wave of the future. And each region had very specific notions about tariffs, taxes, money supply, and the role of the federal government in controlling or nurturing local arrangements.