Those who suspect the worst about the Obama administration and the media won’t have their beliefs contradicted by former CBS News reporter Sharyl Attkisson’s explosive book, “Stonewalled: My Fight for Truth Against the Forces of Obstruction, Intimidation and Harassment in Obama’s Washington.” “Stonewalled,” in which Ms. Attkisson recounts the conflicts over coverage with network executives leading up to her resignation in March,snip, but eye-popping excerpts are making their way into the press and social media. The most incendiary charge: that Ms. Attkisson’s personal computer and CBS laptop were hacked after she began filing stories about Benghazi that were unflattering to...