Mealey's (November 15, 2022, 3:52 PM EST) -- CINCINNATI — The Sixth Circuit U.S. Court of Appeals said in denying a petition for mandamus that while an opioid multidistrict litigation court order allowing plaintiffs to add a defendant after a case is chosen for a bellwether trial is “unconventional,” it is “not a judicial usurpation of power nor a clear abuse of discretion.”...