The senate rejected the treaty of versailles mainly because it included the united nations the league of nations an agreement with france an agreement with germany

The Senate rejected the Treaty of Versailles based primarily on objections to the League of Nations. The U.S. would never endorse the treaty or join the League of Nations. The U.S senators, headed by Senate Majority Leader Henry Cabot Lodge, opposed the treaty because they felt the U.S was giving up too much power under the League of Nations.