Three challengers are attempting to unseat Muscogee (Creek) Nation Principal Chief David Hill, who is seeking a second four-year term as leader of the fourth-largest tribe in the U.S. with 99,801 …Three challengers are attempting to unseat Muscogee (Creek) Nation Principal Chief David Hill, who is seeking a second four-year term as leader of the fourth-largest tribe in the U.S. with 99,801 …