Truman was nominally a member of the Klan, from 1920 to 1922, between two and three years.  He paid dues but there is no record of his ever participating.  1922 was the years Truman entered politics as an elected county court judge.  Truman was pro-Catholic and Pro-Jewish, which put him at odds with the Klan.  McKinley was an Ohio Republican, when the Klan was Southern and anti-Republican.  Wilson was racist but there is no record he ever was a member of the Klan.  Harding took a strong anti-Klan stance and appointed Blacks to federal offices. Coolidge was a Vermonter, where there was no Klan activity.  Most legitimate historians call your right-wing invented history, "hogwash".  Some of you folks will swallow absolutely anything!