WASHINGTON (REUTERS) - United States President Donald Trump strongly denied on Thursday (Sept 3) a magazine report saying he had spoken disparagingly about fallen US military personnel buried in Europe and declined to visit an American cemetery during a trip to France because he thought it unimportant.

The Atlantic magazine reported that Mr Trump, a Republican who is running for re-election and who has touted his record helping US veterans, had referred to marines buried in an American cemetery near Paris as "losers" and declined to visit in 2018 because of concern that the rain that day would mess up his hair.

Mr Trump told reporters on Thursday the story was false.

"To think that I would make statements negative to our military and fallen heroes when nobody has done what I've done (for the US armed forces)," Mr Trump said. "It's a total lie... It's a disgrace."

The president said he did not go to the cemetery because weather prevented a helicopter flight. The alternative, a long drive, would have meant going through very busy areas of Paris and the Secret Service objected, he said.

"The Secret Service told me, 'you can't do it.' I said, 'I have to do it. I want to be there.' They said, 'you can't do it,'" Mr Trump said.

The Atlantic did not immediately respond to an e-mailed request for comment outside regular business hours.

Democratic presidential candidate Joe Biden, who is leading Mr Trump in national polls ahead of the Nov 3 election, emphasised his own commitment to helping members of the military in a response to the report.

"If the revelations in today's Atlantic article are true, then they are yet another marker of how deeply President Trump and I disagree about the role of the President of the United States," Mr Biden said in a statement released by his campaign.

"And if I have the honour of serving as the next commander in chief, I will ensure that our American heroes know that I will have their back and honour their sacrifice - always."

As a presidential candidate, Mr Trump made negative comments about now-deceased Senator John McCain for having been captured during the Vietnam War.

"He was a war hero because he was captured. I like people who weren't captured," Mr Trump said in 2015 when he was running for the Republican presidential nomination.

Mr Trump said on Thursday he disagreed with Mr McCain but still respected him.

"I was never a fan. I will admit that openly," Mr Trump said. "I disagreed with John McCain. But I still respected him."