Mike Rounds
Republican · SD · U.S. Senate
Bio
Marion Michael Rounds is an American businessman and politician serving as the junior United States senator from South Dakota since 2015. A member of the Republican Party, he served as the 31st governor of South Dakota from 2003 to 2011.
Full bio on Wikipedia →Record of service
- In office
- 11.6 years
- First took office
- 2015 (2 terms)
- Seniority
- 65 of 100 by time served
- Age
- 71
- Senate class
- 2 · junior senator
- Pierre, SD · 605-224-1450
- Sioux Falls, SD · 605-336-0486
- Aberdeen, SD · 605-225-0366
- Rapid City, SD · 605-343-5035
Service history, offices and identifiers from unitedstates/congress-legislators (public domain). Years served sum each term rather than subtracting the first start date, so a break in service is not counted as time in office.
Reported net worth
- Assets
- $4.5M – $13.1M
- Liabilities
- $500k – $1.0M
- Net worth
- $3.5M – $12.6M
- Since 2018
- +$3.5M
From annual financial disclosures, which report every asset and debt as a bracket — so these are ranges, and the figure shown is their midpoint. A primary residence is not a reportable asset while its mortgage is a reportable debt, which pushes some members negative. How this is calculated →
Overall lean (DW-NOMINATE)
Issue profile
Each issue runs left ↔ right, scored from how the member voted on bills tagged to that issue (−1…+1). Issues with too few votes are blank. Overall lean uses DW-NOMINATE.
How they score against the parties
Mike Rounds's voting record compared with each party's national platform, issue by issue — the same similarity score used across the site.
On the political map
Mike Rounds (the large ringed dot) among every current member of Congress and the party platforms.
Each small dot is a current member (Dem · Rep); the larger dots are party platforms — click one for its closest members. Economic axis: taxes, healthcare, labor, energy. Social axis: abortion, guns, immigration, civil rights, crime.
Do you vote like Rounds?
Answer a few questions on the issues and see which members of Congress — and which party — actually line up with you.
Caucuses & committees
Where Roundssits in Congress's own organization — each group's lean is computed from its members' voting records. Explore them all on the caucuses and committees pages.
Committees
- Commission on Security and Cooperation in Europecenter · 9 members
- Senate Committee on Indian Affairscenter · 11 members
- Senate Select Committee on Intelligencecenter · 21 members
- Senate Committee on Appropriationscenter · 29 membersEnergy and Water DevelopmentDepartment of Interior, Environment, and Related AgenciesDepartments of Labor, Health and Human Services, and Education, and Related AgenciesMilitary Construction, Veterans Affairs, and Related AgenciesAgriculture, Rural Development, Food and Drug Administration, and Related AgenciesLegislative Branch
- Senate Committee on Armed Servicescenter · 27 members
- Senate Committee on Banking, Housing, and Urban Affairscenter · 24 members
Most and least aligned members
Treating Rounds's 14 issue scores as a vector, cosine similarity measures whether two voting records point the same way (+100%) or in opposite directions (−100%) — the colleagues whose records align most and least with theirs.
Recent notable votes
Latest news
Kristi Noem's embarrassing half-horse statue caps her spectacular downfallThe latest addition to Pierre’s Trail of Governors stands out. It’s not because it’s the only statue of a woman. It’s not because it’s the only one accompanied by half a horse. It represents a career of political tumult. A career from which it’s unlikely ther…
Raw Story · August 22, 2026
Dem drops US Senate bid, leaving independent candidate as lone challenger to incumbent GOP Sen Mike RoundsDemocratic Senate candidate Julian Beaudion dropped out of the South Dakota race, leaving only GOP Sen. Mike Rounds and independent challenger Brian Bengs in the contest.
Fox News · August 5, 2026
Democratic Nominee Quits South Dakota RaceSouth Dakota's Senate contest got a major shake-up on Tuesday, two months after the state's primary. Julian Beaudion, the Democratic nominee challenging GOP Sen. Mike Rounds, withdrew on the deadline to drop out of the race, citing a "devastating house fire" …
Newser · August 5, 2026
Even Republicans Want Nothing to Do With Trump’s Canada TariffsPresident Trump’s new tariffs on Canada are drawing a backlash from lawmakers in his own party. Republicans in the Senate are skeptical of Trump’s 50 percent tariffs on most Canadian goods, excluding energy products, potash, fish, and critical minerals. Senat…
The New Republic · July 22, 2026
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