Irreconcilables

This article is about the opponents of the Treaty of Versailles. For the group of Confederate veterans who moved to Brazil following the American Civil War, see Confederados.
For Irreconcilables during the Philippine–American War, see Irreconcilables (Philippines).
Irreconcilables, Senators Borah and Johnson, refuse to compromise on the passage of the Treaty of Versailles which Senator Lodge is guiding through the Senate. Political cartoon, 1920.

The Irreconcilables were a group of 12 to 18 United States Senators who opposed the United States ratifying the Treaty of Versailles.

The group, largely Republican but also including some Democrats, fought intensely to defeat the ratification of the treaty by the Senate in 1919. They succeeded, and the United States never ratified the Treaty of Versailles and never joined the League of Nations.