They helped transport people and goods all around tge country quickly and efficiently
Answer:
people of the united states
Explanation:
Checks and balances: the system ensures that all of the branches maintain equal power by giving each of them a check against one another.
(System gives each of the three branches of government ways to limit the powers of the other branches)
Separation of powers: idea that the government should be divided into 3 distinct and separate branches, such as the legislative branch, executive branch and the judicial branch.
(Constitutional authority is shared by three different branches of government)
He believed that the expansion of slavery endangered the union