Attorneys for Hunter Biden requested a new trial in court papers filed Monday, arguing that his "convictions should be vacated" because the trial commenced before a circuit court formally issued a mandate denying his appeal -- a technical argument disputing not the merits of the case, but a procedural claim.

Nearly two weeks after President Joe Biden's son Hunter Biden was convicted on three felony gun counts, he is waging a long-shot bid to fight that outcome.

Attorneys for Hunter Biden requested a new trial in court papers filed Monday, arguing that his "convictions should be vacated" because the trial commenced before a circuit court formally issued a mandate denying his appeal -- a technical argument disputing not the merits of the case, but a procedural claim.

"Here, no mandate was issued during the trial or even now," attorneys for Biden wrote. "Consequently, the conviction must be vacated."

The younger Biden was found guilty earlier this month on two counts of making false statements for saying on a federal form that he was not addicted to drugs at the time he purchased a Colt Cobra 38SPL revolver in October 2018, and a third count of illegally obtaining the firearm while addicted to drugs.

Attorneys for Hunter Biden also argued in a separate filing Monday that the Supreme Court's decision this week in U.S. v. Rahimi, which upheld a longstanding federal ban on firearms for people under domestic violence restraining orders, supported their motion for an acquittal or, "at a minimum," a new trial.

Chief Justice John Roberts wrote in that decision that when "an individual poses a credible threat to the physical safety of an intimate partner, that individual may -- consistent with the Second Amendment -- be banned from possessing firearms while the order is in effect."