The right of the united states' national government to establish post offices, regulate commerce with foreign nations, and declare war, all on behalf of the constituent states, are referred to as which of the selections listed below?

Why were americans concerned about the future of north and south america? check all of the boxes that apply. they worried that european countries would take over independent countries in latin america. they thought that european nations could threaten democracy in the united states. they believed that europe would never again return to the americas.