At a Portland town hall days before his primary win, Graham Platner went out of his way to distinguish himself from a member of the Senate Democratic caucus he wants to join.“I don’t want to go down there and simply be not functional,” Platner said. “You can’t just go down there and be John Fetterman and just, and just kind of sort of be an asshole.” He stopped himself briefly to add: “He said mean things about me. I’m allowed to say that.” Fetterman, who flipped his Pennsylvania seat blue in 2022, has indeed taken aim at Platner following a...