Question

3. How does this compound government provide "double security" to the people?

Answer 1

Separation of powers federalism. The branches would be checked by the federal and state governments to control each other

Answer 2

“In the compound republic of America, the power surrendered by the people is first divided between two distinct governments, and the portion allotted to each subdivided among distinct and separate departments. Hence a double security arises to the rights of the people.