[1] Arnold was born in Boonville, Indiana on July 13, 1872; four months later his parents moved to Newburg in Washington County, Wisconsin, where his father had a hardware store.
He taught school one year and then went to work for the Vilter Manufacturing company of Milwaukee, where he was engaged in erecting icemaking and refrigerating plants.
Arnold was the 1922 Socialist nominee for Governor of Wisconsin[6] and came in third to Progressive Republican John James Blaine and Democrat Arthur A. Bentley, with 39,570 votes (8.21% of a total of 481,828).
[9] During his tenure, he was offered a role on the State Tax Commission by Governor Philip La Follette, but preferred to remain in Milwaukee.
[10] He was elected in 1933 as a Wet delegate to the Wisconsin convention which voted to ratify the Twenty-first Amendment to the United States Constitution.