Shift Key is off for Labor Day, so we’re running this classic episode. The power grid is straining as new data centers, factories, and electric vehicles come online. For the first time in 15 years, American electricity demand is rising again. The easiest option is to meet that new demand with new supply — new power plants. But in many parts of the country, it can take years to hook up new wind, solar, and batteries to the grid. The reason why is a clogged and broken system called the inte...