There are several active Hawaiian autonomy or independence movements, each with the goal of realizing some level of political control over single or several islands. The groups range from those seeking territorial units similar to Indian reservations under the United States, with the least amount of independent control, to the Hawaiian sovereignty movement, which is projected to have the most independence. The Hawaiian Sovereignty movement seeks to revive the Hawaiian nation under the Hawaiian constitution. Supporters of this concept say that Hawaii retained its sovereignty while under control of the United States.