Many political scientists have defined political science as the study of the state and government. However, a prominent figure often credited with this definition is:

James Wilford Garner

Garner, an American political scientist, defined political science as beginning and ending with the state and dealing solely with the state.

While Garner is a well-known proponent, it's important to note that the study of political science has evolved, and contemporary definitions often encompass a broader range of topics beyond just the state and government.

You can find more information about Garner's views on political science in his published works and academic analyses of his contributions to the field.