A puppet ruler is a person who has a title indicating possession of political power, but who, in reality, is controlled by outside individuals or forces. Such outside power can be exercised by a foreign government, in which case the puppet ruler's domain is called a puppet state

Puppet state

A puppet state is a nominal sovereign of a state who is de facto controlled by a foreign power. The term refers to a government controlled by the government of another country like a puppeteer controls the strings of a marionette...

. But the puppet ruler may also be controlled by internal forces, such as non-elected officials.

A puppet does not have to be a national ruler. For example, Oscar K. Allen

Oscar K. Allen

Oscar Kelly Allen, Sr. , also known as O. K. Allen, was the 42nd Governor of Louisiana from 1932 to 1936. He was a key lieutenant in the political machine of Huey Pierce Long, Jr., that dominated the state during the first half of the 1930s...

 was widely recognized to be Huey Long

Huey Long

Huey Pierce Long, Jr. , nicknamed The Kingfish, served as the 40th Governor of Louisiana from 1928–1932 and as a U.S. Senator from 1932 to 1935. A Democrat, he was noted for his radical populist policies. Though a backer of Franklin D...

's puppet while serving as governor of Louisiana.