The District of Columbia’s Office of the Chief Medical Examiner on Sunday released preliminary findings indicating Sen. Lindsey Graham suffered an aortic dissection due to arteriosclerotic cardiovascular disease before his death.

Graham, 71, was pronounced dead at George Washington University Hospital at 10:23 p.m. Saturday, according to a joint statement from the Metropolitan Police Department and the District of Columbia’s Office of the Chief Medical Examiner. An autopsy was performed Sunday.

The medical examiner emphasized that the findings are not final and that Graham’s death certificate will remain pending while toxicological and microscopic testing is completed.

“The preliminary examination findings were: Aortic Dissection due to Arteriosclerotic Cardiovascular Disease,” the medical examiner’s office said in a statement.

SEN. LINDSEY GRAHAM DEAD AT 71 AFTER ‘BRIEF AND SUDDEN’ ILLNESS, OFFICE SAYS

The office emphasized that the findings are preliminary and that Graham’s death certificate remains pending. Officials said comprehensive toxicological and microscopic testing is routinely conducted when an autopsy is performed in the District and must be completed before the death certificate is updated with the cause and manner of death.

An aortic dissection is a tear in the inner layer of the aorta, the body’s largest artery, that allows blood to flow between the layers of the vessel wall, according to the Mayo Clinic. The condition is considered a life-threatening medical emergency that can lead to severe internal bleeding or organ damage.

Arteriosclerotic cardiovascular disease refers to the buildup of plaque inside the arteries, which can restrict blood flow and increase the risk of serious heart and vascular complications.

LINDSEY GRAHAM, SOUTH CAROLINA SENATOR WHO ROSE FROM SMALL-TOWN ROOTS TO GOP POWER BROKER, DIES AT 71

The release of the preliminary findings comes after Graham, 71, died Saturday night, shocking colleagues in Washington and across the nation.

Graham, a Republican who was first elected to the Senate in 2002 after serving four terms in the House of Representatives, became one of the chamber’s most influential voices on national security, foreign policy and the judiciary. He chaired the Senate Judiciary Committee during President Donald Trump’s first term and was one of the president’s closest allies on judicial nominations and defense policy.

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Following news of Graham’s death, tributes poured in from lawmakers across the political spectrum, with colleagues remembering his decades of public service and his influence on some of the Senate’s most consequential debates.

The Office of the Chief Medical Examiner said it will update Graham’s death certificate after toxicological and microscopic testing is complete.

More than three dozen California legislators are calling for Gov. Gavin Newsom to exempt the state’s film and TV production incentive program from a recently approved cap on corporate tax credits, warning that without action it will be “significantly kneecapped.”

Though the state’s budget has already been approved, the legislators say a solution must be devised before the end of the year so that production companies do not lose the “full value of tax credits they earned in exchange for creating middle-class entertainment industry jobs,” according to a letter dated Friday and addressed to Newsom, State Senate President Pro Tempore Monique Limón and Assembly Speaker Robert Rivas.

“Tax credits earned for creating jobs in motion picture and television production are not the same as tax credits provided for research and development,” the letter states. The legislation “creates short-term budget savings by reneging on commitments made to the entertainment industry and the working families who depend upon it for their livelihoods.”

The letter comes shortly after Newsom signed his final state budget as California’s governor, a $351.7-billion spending plan that includes new limitations on corporate tax credits.

The budget includes a provision that restricts the maximum tax credit companies can claim in a given year to $5 million or 50% of a company’s tax state tax liability, whichever is greater.

Hollywood industry representatives had warned the governor’s office that the new restrictions could affect the state’s production incentive program, which was just bolstered last year to an annual cap of $750 million.

The film and TV industry in Southern California has struggled to rebound from the effects of the pandemic, the dual writers’ and actors’ strikes in 2023 and the exodus of production to other states and countries.

Members who voted for the budget bill had believed there was a carve-out for the film and TV tax credit program, said Assemblyman Rick Chavez Zbur (D-Los Angeles), chair of the Assembly Democratic Caucus.

“I don’t think that anyone understood what this cap was, what it did and that it effectively kneecapped and reverses the progress that we made last year,” Zbur, who co-authored last year’s bill, said in an interview. “We need to have people understand that these changes, which I think people believed were minor, are really significant and will result in significant job loss if we don’t fix them.”

The new changes to the state’s film and TV tax credit program, which included expanded eligibility for additional shows and films, came after intense lobbying from studios and industry workers, who argued that more funding was necessary to lure production back from other states and countries.

Last week, the California Film Commission said the expanded tax credit program was set to deliver $6.6 billion in direct production spending in-state and more than 34,000 cast and crew jobs across the 170 total film and TV shows that received production incentives this year.

Sen. Lindsey Graham’s, R-S.C., sudden death from an undisclosed illness has triggered a two-pronged approach to replace him, and President Donald Trump will likely be a focal point in the process.

Graham’s passing overnight comes at a time when Republicans in the upper chamber need every vote they can get. The Senate GOP now holds a 52-seat majority, and with the timetable for Sen. Mitch McConnell’s, R-Ky., absence still unclear, that majority is now effectively 51 votes.

That will up the pressure, and drama, to find a replacement for the longtime South Carolina lawmaker.

LINDSEY GRAHAM, SOUTH CAROLINA SENATOR WHO ROSE FROM SMALL-TOWN ROOTS TO GOP POWER BROKER, DIES AT 71

Trump, during an appearance on NBC’s “Meet the Press” on Sunday, said, “I have somebody that I think would be great.”

“But I don’t want to say it now because it’s just, it’s too soon with Lindsey,” Trump said. “I don’t wanna even talk about anybody, but I do have somebody that I think is really good.”

It’s a process guided by the Constitution and state law. The first step will require South Carolina Gov. Henry McMaster, a Republican, to appoint a replacement for Graham on a temporary basis.

McMaster, a close ally of Trump, can appoint a temporary replacement as soon as he wants. That pick will serve until the next special or general election.

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Fox News Digital did not immediately hear back from McMaster’s office on when he would make the announcement, or who he was considering for the seat.

Graham was already in-cycle running for a fifth term in the upper chamber, and he easily cruised to a primary victory early last month. That means that whoever McMaster taps would serve until the end of the year to finish off the remainder of Graham’s fourth term.

The second prong is finding his long-term successor.

The candidate filing period for that special election to win the GOP nomination opens July 21. The election is slated for Aug. 11, according to South Carolina law.

That race could see several familiar faces in South Carolina GOP politics jumping in, including McMaster himself, who is termed out as governor.

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Trump heaped praise on McMaster, noting that he endorsed his first bid for the White House in 2016.

“Henry’s been a great governor, you know now he’s termed out, but he’s going to do the right thing,” Trump said. “I think Henry will be fantastic.”

There are six members of South Carolina’s GOP congressional delegation who could toss their hats into the mix. Rep. Nancy Mace, R-S.C., who recently lost a bid for the GOP gubernatorial nomination, is eyeing jumping into the special election.

A person familiar with Mace’s plans told Fox News Digital, “Congresswoman Mace is considering a bid to run.”

Then there’s Rep. Joe Wilson, R-S.C., the longest-serving Republican member of the Palmetto State’s delegation. He quickly snuffed speculation about whether he’d leap into the fray.

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“I was grateful to speak with President Trump today reminiscing about our mutual friend, Senator Lindsey Graham,” Wilson said on X. “I assured him my goal is to remain in the House to keep his two-vote majority for the American people!!!”

Then there’s the remaining four: South Carolina Republican Reps. Ralph Norman, who also lost out on scoring the GOP nomination for governor, Russell Fry, William Timmons and Sheri Biggs, none of whom, so far, have signaled that they would jump into the battle for Graham’s seat.

Meanwhile, South Carolina Lt. Gov. Pamela Evette could also be in the mix.

A source familiar told Fox News Digital that Evette is receiving “tons of encouragement from all across the state and from around the country” to serve as the temporary caretaker for Graham’s seat.

The source said that Evette is also being encouraged to run to seek a full six-year term in the Senate.

Evette, a top South Carolina ally of Trump’s and McMaster’s, was endorsed by both as she finished first in South Carolina’s Republican gubernatorial primary in this year’s race to succeed McMaster. 

But after Trump also endorsed her  GOP rival in the runoff, State Attorney General Alan Wilson, she was trounced by Wilson a few weeks ago in the runoff election

Fox News Digital did not immediately receive responses to requests for comment from possible contenders in the House.