Former President Bill Clinton’s doubled-down in his tense interaction with Black Lives Matter protesters today by praising his wife’s work to save lives in Africa, adding that it is “a place where Black Lives Matter.” The jibe came in Philadelphia, where he’s stumping for his wife’s struggling 2016 campaign. “I’ll tell you another story about a place where Black Lives Matter: Africa,” Clinton said. “The other day, I started my day with a picture that was sent to me on my iPad of a little guy running a store—he wasn’t very tall—in Tanzania in Dar es Salaam. You know what...