There are, moreover, two considerations particularly applicable to the federal system of America, which place that system in a very interesting point of view. First. In a single republic, all the power surrendered by the people is submitted to the administration of a single government;
The reason why Southerners were more likely than Northerners to support the Mexican-American War is because an American victory in the war would lead to more territory in the South being gained (territory once belonging to Mexico).