In January, 1892, he was appointed by the Democratic National Committee as one of its members, to fill the vacancy caused by the resignation of John L. Mitchell. When the national convention assembled later that year, he was elected a member of that committee by the Wisconsin delegation for the full term of four years. He was later appointed, by the chairman of the national committee, one of the committee of nine to manage the campaign. At the meeting of the national committee in January, 1896, Wall was appointed member of the committee of nine which was given full power to arrange all of the preliminaries for the convention held in Chicago in July, 1896. At that convention he was re-elected a member of the national committee for the full term of four years.