Texas has a plural executive branch system limiting the power of the governor, which is a weak executive compared to some other states. Except for the secretary of state, voters elect executive officers independently; thus candidates are directly answerable to the public, not the governor. This election system has led to some executive branches split between parties and reduced the ability of the governor to carry out a program. When Republican president George W. Bush served as Texas's governor, the state had a Democratic lieutenant governor, Bob Bullock. The executive branch positions consist of the governor, lieutenant governor, comptroller of public accounts, land commissioner, attorney general, agriculture commissioner, the three-member Texas Railroad Commission, the State Board of Education, and the secretary of state.