TheIrreconcilables were a group of 12 to 18United States Senators who opposed the United States ratifying theTreaty of Versailles.

The group, largelyRepublican but also including someDemocrats, 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 theLeague of Nations.

The Republican Party controlled the United States Senate afterthe election of 1918, but the Senators were divided into multiple positions on the Versailles question. It proved possible to build a majority coalition, but impossible to build a two thirds coalition that was needed to pass a treaty.^[1] One bloc of Democrats strongly supported the Versailles Treaty. A second group of Democrats supported the Treaty but followedPresidentWoodrow Wilson in opposing any amendments or reservations. The largest bloc, led by SenatorHenry Cabot Lodge,^[2] comprised a majority of the Republicans. They wanted a treaty with reservations, especially on Article 10, which involved the power of the League of Nations to make war without a vote by the United States Congress.^[3] The closest the Treaty came to passage, came in mid-November 1919, was when Lodge and his Republicans formed a coalition with the pro-Treaty Democrats, and were close to a two-thirds majority for a Treaty with reservations, but Wilson rejected this compromise and enough Democrats followed his lead to permanently end the chances for ratification.

Those who have been identified as members of the faction include:

• George W. Norris of Nebraska^[4][5]
• William Borah of Idaho^[4][5]
• Robert La Follette of Wisconsin^[4][5]
• Hiram Johnson of California^[4][5]
• James A. Reed of Missouri^[4][5]
• Thomas Gore of Oklahoma^[4]
• David I. Walsh of Massachusetts^[4]
• Frank B. Brandegee of Connecticut^[4]
• Albert B. Fall of New Mexico^[4]
• Philander C. Knox of Pennsylvania^[4]
• Lawrence Yates Sherman of Illinois^[4]
• George H. Moses of New Hampshire^[4]
• Asle J. Gronna of North Dakota^[4]
• Joseph I. France of Maryland^[4]
• Bert M. Fernald of Maine^[4]
• Medill McCormick of Illinois^[4]
• Charles S. Thomas of Colorado^[4]
• Miles Poindexter of Washington^[4]

With the exception of Reed, Walsh, and Gore, all of the Irreconcilables were Republicans.

McCormick's position can be traced to hisAnglophobia and nationalistic attitudes, Sherman's to personal antipathy to PresidentWoodrow Wilson and his domestic policies.^[6] Walsh, the Massachusetts Democrat, argued that the Treaty failed to address the "Irish question".^[7] Most of the Irreconcilables were bitter enemies of President Wilson, and he launched a nationwide speaking tour in the summer of 1919 to refute them. However, Wilson collapsed midway with a serious stroke that effectively ruined his leadership skills.^[8]

According to Stone's 1970 book, the Irreconcilables in the Senate fell into three loosely defined factions. One group was composed of isolationists and nationalists who proclaimed that America must be the sole commander of its destiny, and that membership in any international organization that might have power over the United States was unacceptable. A second group, the "realists", rejected isolationism in favor of limited cooperation among nations with similar interests. They thought the League of Nations would be too strong. A third group, the "idealists", called for a League with far reaching authority. The three factions cooperated to help defeat the treaty. All of them denounced the League as a tool of Britain and its nefarious empire.

Among the American public as a whole, the Irish Catholics and theGerman Americans were intensely opposed to the Treaty.^[9]

• Treaty of Versailles
• Henry Cabot Lodge
• Woodrow Wilson

• Bailey, Thomas A.Woodrow Wilson and the Great Betrayal (1945)
• Duff, John B. "The Versailles Treaty and the Irish-Americans,"Journal of American History Vol. 55, No. 3 (Dec., 1968), pp. 582–598in JSTOR
• Stone, Ralph A.The Irreconcilables: The Fight Against the League of Nations. (University Press of Kentucky, 1970)
• Stone, Ralph A. "The Irreconcilables' Alternatives to the League,"Mid America, 1967, Vol. 49 Issue 3, pp 163–173,
• Stone, Ralph A. "Two Illinois Senators among the Irreconcilables,"Mississippi Valley Historical Review Vol. 50, No. 3 (Dec., 1963), pp. 443–465in JSTOR
• Stone, Ralph A. ed.Wilson and the League of Nations (1967), articles by scholars.