Eleven days before the November 2016 presidential election, Hillary Clinton was shocked when she learned that the FBI had reopened the investigation into her use of a private email server while serving as secretary of state. But instead of falling apart, a new book reveals that the presidential candidate comforted her top aide, Huma Abedin, who was sobbing because her then-husband, disgraced New York Congressman Anthony Weiner, was to blame. “It was wrenching to watch the pain this news caused Huma,” writes the former head of communications for Clinton’s campaign, Jennifer Palmieri, in her upcoming book, Dear Madam President: An...