The New Mexico Constitution, and statehood itself, resulted from a protracted struggle. In 1848, most of what is now New Mexico was ceded by the Treaty of Guadalupe Hidalgo to the United States as part of the territory Mexico lost in the Mexican-American War. In 1850, Congress declared New Mexico a territory. It took New Mexico 62 more years, however, to gain statehood; this was a considerably longer time than all the other territories seeking admission to the Union during that time–from California in 1850 to Oklahoma in 1907. After it came under the control of...
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