President Donald Trump is angrily denying a report that he made disparaging remarks about U.S. service members who have been captured or killed, including that he described American war dead at the Aisne-Marne American Cemetery in France in 2018 as “losers” and “suckers.”

“This is more made up Fake News given by disgusting & jealous failures in a disgraceful attempt to influence the 2020 Election!” Trump tweeted late Thursday.

The allegations were reported in The Atlantic. A senior Defense Department official with firsthand knowledge of events and a senior U.S. Marine Corps officer who was told about Trump’s comments confirmed some of the remarks to The Associated Press, including the 2018 cemetery comments.

Democratic presidential nominee Joe Biden and others criticized the president for his alleged remarks.

Biden declared Trump “unfit” for the presidency Friday, delivering an impassioned reaction to the report.

Voice cracking, Biden told reporters that “you know in your gut” Trump’s comments, if true, are “deplorable.”

“I’ve just never been as disappointed, in my whole career, with a leader that I’ve worked with, president or otherwise,” Biden added. “If the article is true — and it appears to be, based on other things he’s said — it is absolutely damning. It is a disgrace.”

He added that “the president should humbly apologize to every Gold Star mother and father, to every Blue Star family that he’s denigrated ... Who the heck does he think he is?”

On a call with reporters hosted by the Biden campaign Friday, Illinois Sen. Tammy Duckworth lambasted Trump for “belittling the sacrifices of those who have shown more bravery than he’s capable of.”

Duckworth, a retired Army National Guard lieutenant colonel who lost both of her legs in the Iraq War, has been a prominent critic of Trump’s handling of military issues. Knocking Trump for allegedly inventing an injury to avoid serving in the Vietnam War, Duckworth said she’d “take my wheelchair and my titanium legs over Donald Trump’s supposed bone spurs any day.”

Khizr Khan, the Gold Star father who drew national attention after criticizing Trump during the 2016 Democratic National Convention, joined Duckworth on the call and said Trump’s “life is a testament to selfishness.”

“Words we say are windows into our souls. So when Donald Trump calls anyone who places their lives in service of others a loser, we understand Trump’s soul,” he said. Khan’s son, Humayun, was killed in action in Iraq in 2004.

Fox News correspondent Jennifer Griffin said Friday she spoke with two top officials who confirmed “key details” of the stunning report in The Atlantic.

Griffin said Friday, “I’ve spoken with two U.S. senior officials who were on the trip to France who confirmed to me key details in The Atlantic article and the quotes attributed to the president.”

One of those sources — a former Trump administration official — apparently told Griffin that Trump said of Vietnam, “It was a stupid war. Anyone that went was a sucker.”

The White House swiftly mounted a concerted defense of the president, with Trump’s campaign and allies taking to social media and broadcast interviews to denounce the report.

In the article, defense officials said Trump made the comments as he begged off visiting the cemetery outside Paris during a meeting following his presidential daily briefing on the morning of Nov. 10, 2018.

Staffers from the National Security Council and the Secret Service told Trump that rainy weather made helicopter travel to the cemetery risky, but they could drive there. Trump responded by saying he didn’t want to visit the cemetery because it was “filled with losers,” the official said, speaking on condition of anonymity because the official was not authorized to discuss it publicly.

The White House blamed the canceled visit on poor weather at the time.

In another conversation on the trip, The Atlantic said, Trump referred to the 1,800 Marines who died in the World War I battle of Belleau Wood as “suckers” for getting killed.

Trump, who traveled to Pennsylvania on Thursday, told reporters after he returned to Washington that The Atlantic report was “a disgraceful situation” by a “terrible magazine.”

“I would be willing to swear on anything that I never said that about our fallen heroes," Trump told the reporters, gathered on the tarmac in the dark. “There is nobody that respects them more. No animal — nobody — what animal would say such a thing?"

Trump also reiterated the White House explanation of why he didn’t visit the cemetery. “The helicopter could not fly,” he said, because of the rain and fog. “The Secret Service told me you can’t do it. ... They would never have been able to get the police and everybody else in line to have a president go through a very crowded, very congested area.”

“It’s sad the depths that people will go to during a lead-up to a presidential campaign to try to smear somebody,” said White House chief of staff Mark Meadows.

Secretary of State Mike Pompeo told “Fox & Friends” on Friday that he was with the president for a good part of the trip to France. “I never heard him use the words that are described in that article,” Pompeo said.

Former White House press secretary Sarah Sanders tweeted that she was part of the discussion about visiting the cemetery. “This never happened. I have sat in the room when our President called family members after their sons were killed in action and it was heart-wrenching. ... I am disgusted by this false attack.”

Defense officials also confirmed to the AP reporting in The Atlantic that Trump on Memorial Day 2017 had gone with his chief of staff, John Kelly, to visit the Arlington Cemetery gravesite of Kelly’s son, Robert, who was killed in 2010 in Afghanistan, and said to Kelly: “I don’t get it. What was in it for them?”

The senior Marine Corps officer and The Atlantic, citing sources with firsthand knowledge, also reported that Trump said he didn’t want to support the August 2018 funeral of Republican Sen. John McCain, a decorated Navy veteran who spent years as a Vietnam prisoner of war, because he was a “loser.” The Atlantic also reported that Trump was angered that flags were flown at half-staff for McCain, saying: “What the f—- are we doing that for? Guy was a f—-ing loser.”

Trump acknowledged Thursday he was “never a fan” of McCain and disagreed with him, but said he still respected him and approved everything to do with his “first-class triple-A funeral” without hesitation because “I felt he deserved it.”

In 2015, shortly after launching his presidential candidacy, Trump publicly blasted McCain, saying “He’s not a war hero.” He added, “I like people who weren’t captured.”

Trump only amplified his criticism of McCain as the Arizona lawmaker grew critical of his acerbic style of politics, culminating in a late-night “no” vote scuttling Trump’s plans to repeal the Affordable Care Act. That vote shattered what few partisan loyalties bound the two men, and Trump has continued to attack McCain for that vote, even posthumously.

The magazine said Trump also referred to former President George H.W. Bush as a “loser” because he was shot down by the Japanese as a Navy pilot in World War II.