There are no Benghazi hearings on the House calendar, but the silence doesn’t mean the investigation is fading away. Rep. Trey Gowdy is launching a special committee to wrangle a probe that’s sprawled across the jurisdictions of multiple headline-hungry committee chairmen. And while the South Carolina Republican isn’t committing to specifics, like whether there will be public hearings with high-profile witnesses like former Secretary of State Hillary Clinton, his methodical approach could help the GOP savor a scandal that has at times looked more like a political sideshow. “No one [has] defended the five-minute questioning [process] as the most calculated...