The United States Congress and President Roosevelt agreed that the Oklahoma and Indian territories had to combine to enter the Union as one state, the State of Oklahoma. After congressional passage of the Enabling Act in 1906, Haskell was elected as a delegate by the largest margin in the new state, representing the seventy-sixth district, which included Muskogee. Traveling to Guthrie and the Oklahoma Constitutional convention on November 20, 1906, Haskell would meet William H. Murray from the Muskogee convention and Robert L. Williams. Because of their interactions at both conventions, Haskell and Murray became lifelong friends.