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Members of the Knights of Labor and former members of the Greenback Party attended a convention in Waco on July 5, 1887, and formed an affiliate of the Union Labor Party. Around 300 delegates, mostly members of the Farmers' Alliance, from seventy counties attended a convention on May 15, 1888, to consider possible electoral campaigns. The delegates appointed Mayor H.S. Broiles as a one-man executive committee and he called for a Nonpartisan Convention to be held on July 2–3. The Nonpartisan Convention created a platform and slate of candidates. The ULP endorsed these candidates and platform and William R. Lamb, the chair of the Nonpartisan Convention, was given a seat on the ULP executive committee.