Which concern led the US Senate to reject the Treaty of Versailles?

The United States rejected the Treaty of Versailles due to the opposition of a group of senators called the Irreconcilables, who believed that under the terms of the treaty, the United States would lose too much of its autonomy to the League of Nations.

Explanation:

the conservative movement opposed the women´s suffrage like josephine jewell dodge comanding the national association opposed to woman suffrage.