A federal judge in California will soon decide the fate of Special Counsel David Weiss’s prosecution of Hunter Biden for allegedly failing to file and pay his taxes between 2016 and 2019, when he was actively addicted to drugs, cavorting with prostitutes, and raking in millions of dollars from overseas business deals. Biden’s lawyers will face the jurist at Los Angeles on Monday and argue that Mr. Weiss was illegally appointed to his position of special counsel, and has no standing to bring the case against the first son.