S.D. Codified Laws § 2-12-9
Any person who threatens, harms, offers to make bribes of money or other inducements, offers or gives gifts or other types of consideration to any person for the purpose of obtaining sponsorship or introduction of legislation, influencing the form of legislation, attempting to influence any member of the Legislature to vote for or against any measure pending therein, or for or against any candidate for any office to be elected or appointed by the Legislature, attempting to influence any officer of either house of the Legislature in naming of members and officers of committees, or in the performance of any of his duties, or attempting to influence or control the action of any member in relation to any matter coming before the Legislature, or any of its committees is guilty of a Class 1 misdemeanor.
SDCL 2-12-9