← Who holds officeSouth DakotaJohn ThuneU.S. Senator from South DakotaRepublicanPartyRepublicanOfficeU.S. Senator from South DakotaIn this chamber since2005Current term endsJanuary 2029Official websitethune.senate.govPhone202-224-2321Washington office511 Dirksen Senate Office Building Washington DC 20510Official portrait: U.S. Government Publishing Office, public domain. Service record: the public congress-legislators dataset.