Ravnsborg ran for the U.S. Senate in 2014, losing in the Republican primary to former Governor Mike Rounds, who won the general election.

On September 12, 2020, while driving home from a political fundraiser taking place at a bar,[1] Ravnsborg struck and killed a pedestrian.

Subsequent investigation and legislative proceedings resulted in Ravnsborg's impeachment by the South Dakota House of Representatives in April 2022.

[29] Ravnsborg was endorsed in the general election by 40 county sheriffs,[30] the Fraternal Order of Police,[31] 30 state's attorneys, the National Rifle Association,[32] South Dakota Right to Life,[33] and the Family Heritage Alliance.

[35] The attorneys general of all 50 states, including Ravnsborg, supported the Telephone Robocall Abuse Criminal Enforcement and Deterrence (TRACE) Act,[37] which passed Congress on overwhelming bipartisan majorities and became law in 2019.

[38][39][40] In 2019, Ravnsborg joined his fellow attorneys general by entering into an agreement with 12 phone companies to combat illegal robocalls.

[41][42] In 2020, he joined a bipartisan coalition of 52 state and territory attorneys general on USTelecom's Industry Traceback Group to bolster technological capabilities to improve enforcement against illegal robocallers.

[43] In September 2019, Ravnsborg spoke in front of the U.S. Supreme Court about the opening of a bipartisan antitrust investigation into Google by 50 state attorneys general.

[70] In 2019, Ravnsborg appeared in the 7th Circuit Court in Rapid City to request a warrant of execution for Charles Russell Rhines for the 1992 murder of Donnivan Schaeffer.

[74][75][76][77] In 2019, Noem requested that Ravnsborg investigate Minnehaha County State's Attorney Aaron McGowan after he was absent for two months.

[86] On February 27, 2020, Alabama, Louisiana and South Dakota entered into a joint stipulation and voluntary dismissal with the Archivist of the United States.

The joint stipulation incorporated the Department of Justice's Office of Legal Counsel's opinion; stated that the Archivist would not certify the adoption of the Equal Rights Amendment; and stated that if the Department of Justice ever concludes that the 1972 ERA Resolution is still pending and that the Archivist therefore has authority to certify the ERA's adoption, the Archivist will make no certification concerning ratification of the ERA until at least 45 days following the announcement of the Department of Justice's conclusion, absent a court order compelling him to do so sooner.

[98] In 2019, Ravnsborg signed onto an amicus brief in Bostock v. Clayton County urging the Supreme Court to find that Title VII of the Civil Rights Act of 1964 provides no protection against employment discrimination on the basis of sexual orientation or gender identity.

[102] When South Dakota's electors met on December 14, Noem was visiting Trump in Washington and was replaced by state Republican chairman Dan Lederman.

[102] Ravnsborg, Rhoden, and Lederman then formally ratified South Dakota's results by casting their electoral votes for Trump and Pence.

[102] On December 8, 2020, Texas Attorney General Ken Paxton sued Georgia, Michigan, Wisconsin, and Pennsylvania, where certified results showed Joe Biden defeated Trump.

[104] In Texas v. Pennsylvania, Paxton asked the U.S. Supreme Court to invalidate the states' 62 electoral votes, allowing Trump to win a second presidential term.

[110][111] Election law expert Rick Hasen called the lawsuit "the dumbest case I've ever seen filed on an emergency basis at the Supreme Court.

[117] In 2019, the Indigenous Environmental Network, Sierra Club and other groups sued Ravnsborg, Noem and Pennington County Sheriff Kevin Thom over legislation passed in response to protests against the Keystone Pipeline.

[118] The plaintiffs argued that two laws, one creating a fund to cover the costs of policing pipeline protests and one seeking to raise revenue for the fund by creating civil penalties for advising, directing, or encouraging participation in rioting, violate First Amendment rights by incentivizing the state to sue protesters.

[122] On August 22, 2021, four days before his scheduled trial on the charges arising from Joseph Boever's death, he received another speeding ticket, his seventh in South Dakota since 2014.

[124] DPS secretary Craig Price concluded in the report that Ravsnborg's driving record, coupled with the circumstances surrounding the fatal accident in which he was involved, indicated his unfitness for office.

[133] Ravnsborg said he discovered Boever's body the next morning when he returned the sheriff's car and went to the scene of the collision to search for the carcass of the deer he thought he had struck.

[143] The team was still reviewing evidence as of December 28, when the state's attorney for Minnehaha County confirmed that they were waiting results from testing on "debris that was in the middle of the accident scene" and that a decision on whether to charge Ravnsborg was still pending.

[144] Noem criticized the slowness of the investigation, suggesting in January 2021 that a grand jury be empaneled in order to bring a speedy resolution to the case.

[149] In July 2021, Ravnsborg's legal team filed a motion seeking release of Boever's psychiatric and psychological records, intending to learn whether he was treated for "suicidal ideation" that might have led him to cause the collision.

[150] Judge John Brown granted the motion and allowed for in camera review of Boever's mental health records.

[152] On August 26, 2021, as part of a plea deal, Ravnsborg pleaded no contest to making an illegal lane change and using a phone while driving.

[155] In March 2021, the state House voted 57–11 to pause impeachment proceedings against Ravnsborg while a judge considered the criminal case against him.

[168] Noem appointed Mark Vargo, the Pennington County state's attorney and lead prosecutor in the impeachment trial, to complete Ravnsborg's unexpired term.