National Association of Latino Elected and Appointed Officials
Per them: "NALEO is a non-partisan membership organization whose constituency includes the nation's more than 6,000 elected and appointed officials."
They also have a somewhat minor link to the Mexican government: they administer that government's Ohtli award. Those awards are given to foreigners who push the Mexican government's agenda inside the U.S. Past recipients of that award include Janet Murguia of the National Council of La Raza, U.S. Reps. Luis Gutierrez and Jared Polis, and U.S. Senator Bob Menendez.