[220]
In November 1919, Wilson's Attorney General, A. Mitchell Palmer, began to target anarchists, Industrial Workers of the World members, and other antiwar groups in what became known as the Palmer Raids. Thousands were arrested for incitement to violence, espionage, or sedition. Wilson by that point was incapacitated and was not told what was happening.[221]

Aftermath of World War I
Further information: Foreign policy of the Woodrow Wilson administration
Paris Peace Conference
Main articles: Aftermath of World War I and Paris Peace Conference (1919–1920)
The "Big Four" at the Paris Peace Conference in 1919, following the end of World War I. Wilson is standing next to Georges Clemenceau at right.
After the signing of the armistice, Wilson traveled to Europe to lead the American delegation to the Paris Peace Conference, thereby becoming the first incumbent president to travel to Europe.[222] Although Republicans now controlled Congress, Wilson shut them out. Senate Republicans and even some Senate Democrats complained about their lack of representation in the delegation. It consisted of Wilson, Colonel House,[b] Secretary of State Robert Lansing, General Tasker H. Bliss, and diplomat Henry White was the only Republican, and he was not an active partisan.