Huma Abedin, a longtime top aide to Hillary Clinton and the estranged wife of former Rep. Anthony Weiner (D-N.Y.), writes in a new book that she was sexually assaulted by an unidentified U.S. senator in the mid-2000s. Abedin writes in her forthcoming book, “Both/And: A Life in Many Worlds,” that she attended a dinner in Washington, D.C., with “a few senators and their aides” and then stopped at one of the lawmakers’ homes for a cup of coffee. She said she was invited in after the two had stopped inside his building and was told by the senator to “make...