Final answer:
Federalism is a system of government in which power is divided between the national and state governments. It has evolved in the United States over time, with the federal government gaining more power. Examples of federalism include the federal government's authority to negotiate treaties and the states' power to set driving laws.
Step-by-step explanation:
Federalism is a system of government in which power is divided between a central, or national, government and individual regional political units, known as states. In the United States, the Constitution grants specific powers to the federal government while reserving other powers for the states. This division of powers ensures a balance between national and state interests.
Federalism has evolved in the United States since its founding. Initially, the federal government had limited powers, while states had more autonomy. However, over time, the power of the federal government has expanded, particularly in areas such as commerce, civil rights, and social welfare.
One example of federalism in action is the ability of the federal government to negotiate treaties with other countries, while states do not have this authority. Another example is that state governments have the power to set and enforce driving laws, while the federal government does not have this jurisdiction.