World War I profoundly reshaped both international alliances and domestic politics within the United States. As the war progressed, President Woodrow Wilson articulated a vision for peace that would prevent future global conflicts. His proposal for the League of Nations was a key aspect of this vision. However, Wilson faced significant opposition in the Senate regarding the Treaty of Versailles, which included aims for the League.
Which of the following statements best describes the primary reason for the opposition to the Treaty of Versailles, particularly the League of Nations, in the U.S. Senate?