How many US citizens were against World War 1?

During World War I, it is estimated that a significant portion of the American population, around 20% to 30%, opposed U.S. involvement in the war. This opposition came from various groups, including pacifists, socialists, and some ethnic communities with ties to nations involved in the conflict. Notable organizations, like the American Union Against Militarism, actively campaigned against the war. Overall, while many supported the war effort, a substantial minority voiced their dissent.