S.D. Codified Laws § 12-26-12
A person who directly or indirectly, intentionally, by force or violence, or by unlawful arrest, or by any abduction, duress, damage, harm, or loss, or by any forcible or fraudulent contrivance, or by threats to do or employ any of them, or by threats of bringing civil suit or criminal prosecution, withdrawal of customs or dealing in business or trade, or enforcing payment of debts, or by any kind of injury or threat of injury inflicted or to be inflicted on any voter or person to influence any voter, and attempted, done, or threatened, or caused to be attempted, done, or threatened by any person in his own behalf or in behalf of any other person or question voted upon or to be voted upon at any election, for the purpose of preventing, causing, or intimidating a voter to vote or refrain from voting for or against any person or question, or who does or causes to be done any of such things because of a voter having voted or refrained from voting on any such matter, or who intentionally and without lawful authority obstructs, hinders, or delays a voter on his way to any poll where an election is to be held, is guilty of a Class 2 misdemeanor.
SDCL 12-26-12