What is the phrase, in the first paragraph of Federalist Paper #51, that refers to the use of checks and balances in the federal government?

StephanieRR | Student

"The only answer that can be given is, that as all these exterior provisions are found to be inadequate, the defect must be supplied, by so contriving the interior structure of the government as that its several constituent parts may, by their mutual relations, be the means of keeping each other in their proper places." In this excerpt, Madison first introduces the idea of the different parts of the government being in charge of keeping the others in line.