While western pioneers were changing and being fre changed by the lands to which they migrated, ex pansion itself was bringing great pressure bear er the nation's political .and economic institutions Most people in the East began to entertain the expec b tation that the United States would soon encompass ca all of North America, but there was significant dis- e agreement about what sorts of institutions should b be planted in the new territories. Southerners viewed manifest destiny as a campaign to spread p cotton agriculture. Northerners were equally con vinced 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.