Hunter Biden’s courtroom nightmare should be a dream come true for Republicans, but his criminal trial instead disproves one of Donald Trump’s biggest lies, a columnist wrote Tuesday. The former president insists the criminal justice system has been rigged against him by President Joe Biden, whose oldest living son is currently on trial for a federal firearm charge that even former GOP congressman Trey Gowdy has admitted is rarely brought against anyone, wrote MSNBC columnist Hayes Brown. “It presents Trumpists with a circle that refuses to be squared with any sort of logic — but Republicans a…