Chad, who is three years old, loves to dress up like Batman. According to George Herbert Mead, Chad is in the stag

Political culture.

Explanation:

As the exercise explains, what is known as political culture is the Americans' fundamental beliefs about human nature, society, economic relations, and the role of government. In other words, a political culture is a net of attitudes and practices held by people that molds and shapes their political behavior. This could be, for example, any moral judment or beliefs, ideas, theoris of what should compose a "good" society.