Sen. Mike Rounds (R-SD) is seeking a third term in the Senate, and Tuesday's primary is widely seen as a formality. He faces a single challenger from within his own party, but political analysts expect him to advance without serious difficulty. The real contest will come in November, when Rounds is set to face the Democratic nominee, former state trooper Julian Beaudion.
Polls across South Dakota close at 8 p.m. EDT. Decision Desk HQ will provide live results as they come in, offering a real-time look at voter preferences in the Mount Rushmore State.
Rounds has been a fixture in South Dakota politics for decades, serving as governor before moving to the Senate. His primary opponent has struggled to gain traction, lacking the name recognition and fundraising muscle to mount a credible challenge. The race has drawn relatively little national attention, in part because the outcome is not in doubt.
Beaudion, the presumptive Democratic nominee, is a former state trooper who has cast himself as a moderate alternative to Rounds. He has emphasized his law enforcement background and criticized Rounds for being out of touch with rural voters. But South Dakota has not elected a Democrat to the Senate since 2008, and Beaudion faces long odds in a state that has shifted decisively to the right.
Primary context and broader stakes
The Senate primary is just one of several key races in South Dakota this cycle. The state's open House seat has drawn a crowded field, as Rep. Dusty Johnson runs for governor. That race has already generated significant interest, with Attorney General Marty Jackley leading the GOP primary. Meanwhile, Gov. Rhoden faces his own uphill primary fight, adding another layer of intrigue to the state's political landscape.
Nationally, the primaries are part of a larger wave of elections across six states Tuesday. Decision Desk HQ is tracking live results from all six states, providing a comprehensive view of the political battlefield heading into the general election. The outcomes will help shape the balance of power in Congress and set the stage for the 2026 midterms.
For Rounds, the primary is a necessary hurdle but not a serious threat. His campaign has focused on his record of delivering for South Dakota, including support for agricultural interests and military installations. He has also sought to align himself with the broader Republican agenda while maintaining a reputation for independence on certain issues.
Beaudion, by contrast, has tried to nationalize the race, linking Rounds to what he calls Washington dysfunction. But in a state where Trump won by double digits in 2020, Democrats have little room to maneuver. The general election is expected to be a steep climb for Beaudion, barring an unforeseen shift in the political winds.
As polls close and results begin to trickle in, all eyes will be on whether Rounds can secure a decisive victory in the primary, and how much of a mandate he carries into the fall campaign. The outcome will also offer clues about voter enthusiasm and turnout, which could ripple into other races on the ballot.
