Answer:
State and federal governments share power, but the federal government is supreme.
Step-by-step explanation:
The United States constitutes a federal constitutional republic, with a presidential regime as a form of government based on the separation of powers in three branches: executive, legislative and judicial.
Federalism is the political system by which the functions of government are divided between a central power and associated states. A system of which the USA is a pioneer in theory and practice. The Federal Government exercises exclusively the minimum and indispensable competences to guarantee the political and economic unity of the nation, in matters such as foreign policy and defense, opposing systems based on a unitary or centralized state. The rest of the competences correspond to the federated states or they are exercised in a coordinated way in both levels of government, as in the case of the Education policy. Porte under the federal power is the power of the states (today 50) and after them, the local power, which takes multiple forms and has as a basic administrative unit the county. For its management each state has an elected governor and a legislature of its own.