In one of the weirder political twists of the moment, the two Democrats who stand the greatest chance of flipping the Senate in November represent opposite ideals of American manhood.One, an archetypal warrior, is being accused of toxic masculinity; the other, a proselytizer for compassion and empathy, has been derided as not manly enough. In Maine, oyster farmer and former Marine Graham Platner is the gruff, unshaven, blue-collar contender for the seat of longtime Republican Sen. Susan Collins, who has never met a war she couldn’t vote for or a Supreme Court nominee who couldn’t gull her. In Texas, state...