The governor serves as a spokesperson for the state, promoting business and economic development interests.
The governor is actively involved in the legislative process;[8] they may introduce legislation, and have the power to veto bills passed by the South Dakota Legislature (though vetoes may be overridden by a two-thirds vote of each house).[9]
The governor oversees the executive branch, and appoints the cabinet members. The governor also appoints the members of a wide array of state boards and commissions.[8]
The governor may grant pardons to those convicted of criminal offenses under state law.[8]
The governor fills vacancies that occur in the state legislature, the state judiciary, and other state constitutional offices. The governor also fills vacancies in United States Senate seats from South Dakota.[8]
From 1889 until 1974, the governor served a two-year term. Until the 1940s, the governor was allowed to serve unlimited terms; since that time, governors have been limited to two consecutive terms. The gubernatorial term was extended to four years in 1974. The governor and lieutenant governor run on a single ticket. The gubernatorial nominee must win a primary, whereas the lieutenant governor nominee is selected at a state party convention. After the convention they run on a single ticket.[1]
Two of South Dakota's governors have left office before their terms expired. In 1978, Richard F. Kneip resigned office six months before the expiration of his term to accept an appointment as United States Ambassador to Singapore.[10] On April 19, 1993, George S. Mickelson was killed in a plane crash near Dubuque, Iowa; Mickelson is the only South Dakota governor to die in office. Mickelson and his father, George Theodore Mickelson, are the only father-son duo to serve as governor.[11]
South Dakota's longest-serving governor was Bill Janklow; he was the first governor to complete two four-year terms, and he did it twice, serving from 1979 to 1987 and again from 1995 to 2003.[12] Janklow is also the only person to serve non-consecutive terms as governor.
Of the 50 states, South Dakota currently holds the longest non-interrupted party control of the governorship. The Republican Party has controlled the South Dakota governorship since January 1, 1979.