Multiple sources told The Post on Friday that Corey Lewandowski, a longtime adviser to Donald Trump, and Kristi Noem, the married Republican governor of South Dakota, have been having an affair for years.

A week after Noem, a 51-year-old mother of three, endorsed Trump, 77, for the Republican presidential nomination in 2024, speculation increased that the 45th president could choose her as his running companion. This is when the relationship first came to light.

A source familiar with Noem and Lewandowski’s relationship told DailyMail.com, “He is absolutely banging her.”

The source also claimed to have witnessed Noem “playing grab-ass” and “sitting on his [Lewandowski’s] lap” at an event held at Trump’s Mar-a-Lago estate in March of 2020.

As the source put it, “the usual stuff that drunk people who are having affairs do.”

A second source informed The Post that the relationship has been widely known in Republican political circles for “years” and that Noem’s spouse vacated the governor’s residence in Pierre approximately two years ago.

A third source disclosed to The Post that he and other GOP operatives were “well aware” of the liaison and suggested that “one of her competitors for VP” was responsible for the story’s publication.

Noem, former Arizona gubernatorial candidate Kari Lake, former Secretary of State Mike Pompeo, Sen. Marsha Blackburn (R-Tenn.), former ambassador to Germany Ric Grenell, House Republican Conference Chair Elise Stefanik (R-NY), current GOP presidential candidate Vivek Ramaswamy, and hard-right Rep. Marjorie Taylor Greene (R-Ga.) are just a few of the names that both Trump and political pundits have openly discussed for months regarding possible running mates.

Although Noem was once considered a potential candidate for the 2024 election, she ultimately decided not to run, telling Fox News last month that no Republican could win the nomination as long as Trump remained in the race.

“If you can’t win, why run?” She enquired.

At a rally in Rapid City on September 8, Noem expressed her support for Trump, describing him as “the fighter that our country needs.”

“Let’s make America great again—you did it once,” Noem remarked as she introduced the outgoing president. “I’ll exert every effort to support him in winning and preserving this nation.”

After losing in the Iowa caucuses to Sen. Ted Cruz (R-Texas), the real estate mogul garnered momentum in the New Hampshire primary, which he won. In 2016, Lewandowski, age 49, was Trump’s first campaign manager.

But after he was accused with mistreating Breitbart reporter Michelle Fields at a March 2016 Trump press conference, Lewandowski’s popularity began to decline.

One count of simple battery was filed against him, but it was dismissed later.

Three months later, Lewandowski was dismissed from the Trump campaign allegedly due to differences with campaign chairman Paul Manafort.

Even as a private citizen, the Massachusetts native remained close to Trump. According to the report on the Russia investigation written by former special counsel Robert Mueller, in June 2017, Trump called Lewandowski into the Oval Office and instructed him to tell then-Attorney General Jeff Sessions to both issue a public statement denouncing the investigation and instruct Mueller to limit its scope to future foreign meddling in US elections.

The meeting between Sessions and Lewandowski was scheduled, but the attorney general had to postpone it due to an unforeseen conflict. The following month, Trump called Lewandowski again and instructed him to inform Sessions of his dismissal if Sessions refused to meet. Lewandowski gave the directive to then-acting White House deputy chief of staff Rick Dearborn, who kept it to himself and neglected to deliver it to Sessions.

Even though the former campaign operative and his wife Allison Hardy have been married since 2005, there have been allegations of multiple extramarital affairs and inappropriate behavior with prominent women in the inner orbit of the Trump campaign.

Joy Villa, a musician who supports Trump, părut in November 2017 that Lewandwowski shoved her behind during a holiday celebration. When Villa told Lewandowski to keep his hands to himself, he allegedly responded, “Go ahead, I work in the private sector,” Apparently, he then struck her butt a second time.

Villa told Politico at the time, “It was shocking and completely demeaning.”

Lewandowski allegedly had intermittent romantic relationships with Hope Hicks, the director of White House communications at the time.

In 2021, he lost his position as chairman of the pro-Trump super PAC Make America Great Again Action after being accused of inappropriate behavior by the wife of the former president’s major donor.

Trashelle Odom reported to the Las Vegas police that Lewandowski made vulgar comments about her genitalia and demanded her hotel room number. At one point in their conversation, Odom disclosed to Lewandowski that she was from a “bad area” in California.

“That is when Lewandowski told me that he ‘was from a bad part of Boston and have killed people,’” Odom told the cops. “I initially believed that he was joking and attempted to laugh it off. That is when Lewandowski went into detail and stated something to the effect of, ‘When I was 10, I stabbed someone over and over again, killing him.’ He continued and shared that when he was older he ‘stabbed a man in the back of the head, also killing him.’”

Noem also announced publicly that she was severing ties with Lewandowski, whose office described him as a “volunteer adviser.” However, DailyMail.com reported that the statement was largely empty rhetoric.

“She fired him without really firing him,” one source told the outlet. “He never left.”