Under the U.S. Constitution, what is one power of the states?

One power of the states, as outlined in the U.S. Constitution, is to provide protection, which encompasses establishing and maintaining law enforcement agencies or police forces. This responsibility is part of the states' role in ensuring public safety and maintaining order within their borders.

The Tenth Amendment of the Constitution reserves powers not delegated to the federal government for the states and the people. This includes vital functions such as law enforcement, which is essential for protecting citizens, enforcing laws, and responding to emergencies. State and local police agencies are a direct reflection of this power, as they are tasked with upholding local laws and regulations.

In contrast, enforcing federal laws rests primarily with federal agencies, conducting foreign relations is exclusively the purview of the federal government, and establishing a national currency falls under the authority of Congress, further clarifying why those choices are not powers granted to the states.