What postwar treaty was drafted at the paris peace conference, but was not ratified be the united states senate despite having the support of president wilson?

The postwar treaty which was drafted at the Paris Peace Conference, but was not ratified by the United States Senate despite having the support of President Wilson was the Treaty of Versailles. This was due to some of the articles because some of the articles in the League of Nations conflicted with ideas in the Constitution of the United States. The United States also never joined the League of Nations due to this.