Meet 'Working-Class Mainer' Graham Platner's Oyster Farming Business Partner, an Elite Boarding School Graduate Who Drinks 'Foraged Spring Water' and Owns the Island Where the Farm Is Based

Robert Allerton Cushman III, the son of a Harvard-educated Canadian public health official, has flown under the radar as Platner casts himself as a blue-collar commercial fisherman Maine's far-left Democratic Senate nominee, Graham Platner, has leaned on his career as a "working-class" oyster farmer to cast himself as a blue-collar everyman. His Ivy League business partner—who owns the secluded island where the farm is based—is, well, anything but. Robert Cushman III is an elite New England boarding school graduate who has described his habit of drinking "foraged spring water with Redmond sea salt." He got into the oyster farming business,...