Donald Trump has countered allegations of sexism by touting his support for female employees, saying he loves hiring women because they work harder and because it seemed to him “that there was something that they want to really prove.” Numerous studies and women leaders' own experiences show that Trump may be right — but if women do work harder, it may well be to combat sexism from men. On the same day the New York Times published its examination of Trump’s fraught relationship with women, explaining how the presumptive Republican presidential nominee has engaged in what it called “unwelcome advances,...