A person who holds duties, rights, and responsibilities within a state is called citizen.
A citizen of a nation is understood as a legally recognized subject or national of a state or commonwealth, either native or naturalized.
All citizens are entitled to certain rights and holds duties and responsibilities which tend to be outlined in the Constitution. For instance, the right and responsibility as citizen to vote in order to elect their representatives.
The Reorganization Act allowed to president to hire confidential staff as he saw it fit, while also he was given the power to reorganize the executive branch of the government.