Jimmy Carter said universities with substantial Jewish enrollment have blocked him from discussing his book “Palestine: Peace not Apartheid.” “My most troubling experience has been the rejection of my offers to speak, for free, about the book on university campuses with high Jewish enrollment and to answer questions from students and professors,” Carter said in an Op-Ed published Friday in the Los Angeles Times. The former U.S. president made a similar charge in a C-Span interview earlier this week; asked to elaborate, he would not name the universities, except to say he was invited by individual professors, but turned down...