美北长老会
In 1914, Wishart became the pastor of Second Presbyterian Church in Chicago, joining the Presbyterian Church in the United States of America at this time. He held this position until 1919. During this time, he served as a lecturer at McCormick Theological Seminary from 1915 to 1917. He was a member of the General Board of Christian Education of the Presbyterian Church in the United States of America from 1917 to 1919.