In a 2021 interview with Fox News, JD Vance lamented that the United States was being run by “childless cat ladies” like Vice President Kamala Harris, women who he claimed had no “direct stake” in the country’s future. This week, Ms. Harris received a powerful gesture of support from one of her biggest advocates: the mother of her stepchildren. “For over 10 years, since Cole and Ella were teenagers, Kamala has been a co-parent with Doug and I,” Kerstin Emhoff said in a statement released...