U.S. Senate candidate Graham Platner filed his overdue federal financial disclosure late last week, but the document sheds little light on his personal finances. Platner, a 41-year-old oyster farmer and combat veteran from Hancock County who is seeking the Democratic nomination, was supposed to have filed the disclosure in September, but it wasn’t filed until Friday. The document offers an incomplete look into Platner’s personal finances. The campaign has described him as a working-class oyster farmer and critics have cast him as a man of privilege. Platner is the grandson of Warren Platner, a renowned architect and interior designer. His...