Which symbol represents the United States in the Pledge of Allegiance?

The flag is the symbol that represents the United States in the Pledge of Allegiance. In the context of the Pledge, the flag signifies the nation's values and the unity of the states under one government. It embodies the principles of liberty and justice that the nation strives to uphold. When reciting the Pledge, individuals are demonstrating their respect and allegiance to the ideals represented by the flag, which serves as a visual reminder of the country’s history and aspirations.

The eagle, although a national symbol and the emblem of the United States, does not play a direct role in the Pledge of Allegiance itself. The Constitution is a foundational document that outlines the government's structure and principles but is not represented by a symbol in the Pledge. The Liberty Bell, while historically significant, is not directly related to the Pledge and represents independence and freedom rather than national allegiance. Thus, the flag stands out as the unifying symbol in this context.