The U.S. federal and state governments are similar because both levels of government have the power to

declare war on a nation
collect taxes from citizens
trade with foreign countries
print currency and control banks

The U.S. federal and state governments are similar because both levels of government have the power to collect taxes from citizens and trade with foreign countries. They also share the responsibility for creating and enforcing laws, maintaining order, and providing public services. Additionally, both levels of government have the power to regulate certain industries and activities within their jurisdiction. However, it is important to note that only the federal government has the authority to declare war, print currency, and control banks. These powers are not granted to state governments.