There aren’t any choices here but enlightenment philosophers believed in the power of the individual.
The Framers of the Constitution gave the President the power to veto acts of Congress in order to prevent the legislative branch from becoming too powerful. Congress can override a veto by passing the act by a two-thirds vote in both the House and the Senate.
To deduct why they need laws
The Constitution enumerates certain powers which are reserved to the federal goverment and other powers which are delegated to the state.
Those powers which are not explicitly related in the document to any of the goverment levels will automatically be reserved to and exercised by the supreme federal goverment.