Hillary Clinton offers a detailed account of the deadly attack on the American embassy in Benghazi — and a pointed rebuttal to Republican critics who’ve laced into her over the incident — in a much-anticipated chapter of her forthcoming book, “Hard Choices,” obtained by POLITICO. “Those who exploit this tragedy over and over as a political tool minimize the sacrifice of those who served our country,” Clinton writes in the gripping chapter, “Benghazi: Under Attack.” Casting doubt on the motivations of congressional Republicans who have continued to investigate the attacks, including with an upcoming House select committee, Clinton continues: “I...