Miss. Code Ann. § 23-15-293: Miss. Code Ann. § 23-15-293

Candidates for state, state district and legislative offices shall be voted for and nominated by all the counties or parts of counties within their respective districts, and all the district nominations shall be under the supervision and control of the state executive committee of the respective political parties, which committees shall discharge in respect to such state district nominations all the powers and duties imposed upon them in connection with nominations of candidates for other state officers.