The first proposal dates to a conference held in Tucson that convened on August 29, 1856. The conference issued a petition requesting organization of the territory and signed by 256 people to the U.S. Congress, and elected Nathan P. Cooke as the territorial delegate to Congress. In January 1857, a bill for the organization of the territory was introduced into the United States House of Representatives, but the proposal was defeated on the grounds that the population of the proposed territory was yet too small. Later, a similar proposal was defeated in the Senate. The proposal for creation of the territory was controversial in part because of the perception that the New Mexico Territory was under the influence of southern sympathizers who sought to expand slavery into the Southwest.