On June 27, Rep. Don Haggar, a Republican lawmaker from Sioux Falls, resigned effective immediately from his District 10 position to become the director for the state’s chapter of Americans For Prosperity.

Americans for Prosperity is the conservative advocacy group founded by the Koch brothers.

Haggar’s resignation comes days before a new state law takes effect that would require Haggar to wait two years before becoming a lobbyist. The current wait time is one year.

The vacancy will be filled by gubernatorial appointment.