Energy Secretary Chris Wright has floated an unusual but very creative plan to quickly expand U.S. grid capacity: tapping the industrial diesel generators already sitting at data centers, big-box retailers, and other commercial sites. The proposal comes as multiple regional grids strain under the explosive power demand driven by the data-center boom. Leveraging these idled generators could serve as a short-term bridge until new generation comes online. Bloomberg quoted Wright on Tuesday morning at the North American Gas Forum in Washington, where…