In his latest segment on Last Week Tonight, John Oliver once again proved hes the longform storyteller to John Stewart and Stephen Colberts daily news writers. Last night, Oliver took on Dr. Mehmet Oz, who last week had to address a Senate committee about the often ludicrous claims he makes to describe unregulated nutritional supplements on his popular show. His critique eventually grew into an indictment of the supplement lobby, which has for 20 years fought against regulation from the FDA despite products like Ephedra killing people. …