The United States decides to change its policies on the death penalty. Even if other nations do not approve of this, the United States has the right to do so, free from foreign interference. This is an example of the United States having what kind of power?

Sovereign power

Explanation:

Sovereign power is the ability of a nation to decide its fate, laws and style of government without interference from foreign governments. It is gotten from the concept of sovereignty which means the supreme power of a nation or government or power of self determination.