Elizabeth Heng nearly beat incumbent Democratic congressman Jim Costa in California’s open primaries in early June. The 53–47 outcome would have made her the darling of the national political media, had she been a Democrat. She will face Costa again in the general election in November. My colleague Alexandra DeSanctis wrote an excellent piece last month profiling the young, smart, 33-year-old Republican contender. So this happened yesterday. Heng’s campaign had tried to place this video as an ad on Facebook. It begins with her family’s roots — amidst the horror of Cambodian genocide. Video: https://www.youtube.com/watch?v=GUJXqJ4f_to And Facebook responded with a...