Mr. Biden and Mr. Morris both lived in Los Angeles and became close, with Mr. Morris assisting as Mr. Biden worked to finish a memoir. It detailed his struggles with addiction and loss and credited his new wife, Melissa Cohen, with pulling him back from the brink of despair and self-destruction. It also pushed back against Mr. Trump’s attacks on him and his family.
Mr. Morris, who had donated $2,800 to the Biden campaign before meeting the candidate’s son, donated $55,000 to super PACs supporting the campaign and opposing Mr. Trump in the months after the meeting — exponentially more than he had given to federal committees previously, according to campaign finance records.
As a young man, Mr. Morris worked as an office assistant for a member of the British Parliament, but he has little discernible experience in American politics.
Mr. Morris — who produced a 1997 film called “Hands on a Hardbody: The Documentary,” about an annual competition in Texas to see who can keep their hand on a pickup truck longest — has begun developing the idea and collecting footage for a film featuring Mr. Biden. It is being produced by a company Mr. Morris started last year called Media Courthouse Documentary Collective. The company is also producing films on subjects including cryptology, Congress and the unfolding defamation case brought by Johnny Depp against his ex-wife, the actress Amber Heard.
While the documentary about Mr. Biden is still in the formative stages, according to people familiar with it, they said it could seek to undermine attacks on its subject while also advancing the story of his redemption, including focusing on the launch of Mr. Biden’s career as an artist.
Mr. Morris, who collects art, has encouraged Mr. Biden’s art and owns some of it, according to two people familiar with his collection, though one suggested the art might have been given to him as a gift.