Marion Michael Rounds is an American businessman and politician serving as the junior United States senator from South Dakota since 2015. A Republican, he previously served as the 31st governor of South Dakota (2003–2011) and earlier represented the Pierre-based 24th district in the South Dakota Senate (1990–2001), rising to Majority Leader in the mid-1990s.
Raised primarily in Pierre after being born in Huron, Rounds earned a B.S. in political science from South Dakota State University. Outside politics, he worked in insurance and real estate as a partner at Fischer Rounds & Associates, building a business-first profile rooted in Pierre and statewide commerce.
Rounds entered the governor’s race in 2002 as an underdog, won a crowded and contentious GOP primary, and went on to win the general election. He was reelected in 2006. As governor, he emphasized steady administration and economic development while his tenure also drew later scrutiny around the state’s EB-5 investment-visa program and Northern Beef Packers financing.
In the U.S. Senate, Rounds leans into national security, cybersecurity, veterans’ care, rural health access, and pro-growth tax and regulatory policy. He has also been active on artificial intelligence policy as a co-chair of the Senate AI Caucus and a member of the Bipartisan Senate AI Working Group.
Mainstream Conservative
Committee Assignments
Caucus Memberships
Achievements
- Long executive experience as South Dakota governor (2003–2011), emphasizing administration and economic development.
- Senate focus on national security, defense modernization, and veterans’ issues through Armed Services and Veterans’ Affairs.
- Active footprint on cybersecurity and emerging tech; co-chairs the Senate AI Caucus and helped shape bipartisan AI policy work.
- Prioritized rural health access and South Dakota agriculture and small-business concerns in federal policy debates.
- Generally viewed as a steady, pragmatic conservative within the Senate GOP conference.
Controversies
- EB-5 / Northern Beef Packers scandal: ongoing scrutiny of the state’s investment-visa program and financing decisions during his governorship.
- Criticized by some conservatives as too leadership-aligned or “careful” compared with the party’s populist wing.
- Environmental stance: supported withdrawal from the Paris Agreement and has faced criticism over ties to fossil-fuel interests.
- Opposed the FIRST STEP Act criminal justice reform bill in 2018.
- Drew attention for public breaks with election-fraud claims after 2020, leading to intra-party backlash from Trump allies.
Top Donors
| Donor | Total | Individuals | PACs |
|---|---|---|---|
| Apollo Global Management | $47,500 | $47,500 | $0 |
| Rocket Mortgage | $30,500 | $30,500 | $0 |
| Sanford Health | $28,500 | $28,500 | $0 |
| Blackstone Group | $28,200 | $28,200 | $0 |
| RDV Corp | $28,000 | $28,000 | $0 |
Amounts shown reflect organization-linked giving; most funds listed here are from individual donors or aligned PACs.
Recent Elections
2014 Margin R +20.5%
2020 Margin R +32.4%