Martin Scorsese's film 'The Irishman' is based on the book 'I Heard You Paint Houses' by Charles Brandt. The film and book chronicles the life of Frank Sheeran. Sheeran had links to the Bufalino Crime family.

The film doesn't mention Joe Biden, but the book does. Here's an excerpt of an article about the book:

https://www.ocregister.com/2012/08/17/henry-miller-bidens-unhinged-and-worse-history/

"One additional item relates to Biden’s integrity. In the fascinating biography of Teamsters and Mafia hit-man Frank Sheeran, “I Heard You Paint Houses,” the lifelong thug describes a favor he performed while he was president of Teamsters Local 326 in Wilmington, Delaware.

In 1972 Sheeran received a visit from “a very prominent lawyer” he knew who was “very big in the Democratic Party” in Delaware. The November general election was approaching, and the race for the U.S. Senate seat held by a Republican was expected to be close. The lawyer wanted help in preventing the distribution of a paid Republican political ad – an insert in the Delaware-wide newspapers – that would run for a week and expose the campaign misrepresentations by the Democratic challenger. Sheeran promised the operative that he “would hire some people and put them on the picket line.” He added, “People nobody would mess with.”

The picket line went up, the papers were not delivered all week, and, as Sheeran said, “The day after the election the informational picket line came down, and the newspaper went back to normal and Delaware had a new United States Senator.” His name was Joe Biden. Thereafter, said admitted extortionist, thief and murderer Sheeran, of Biden, “You could reach out for him, and he would listen."

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I'll be honest. I wanted to see if the film 'The Irishman' was secretly hinting at Trump's assassination. While I was digging, I found this nugget on Joe Biden. Thought it was interdasting.

Just google 'Frank Sheeran Joe Biden'.