Abigail Spanberger is stepping directly into the regulatory fight over the proposed $67 billion sale of Dominion Energy to Florida-based NextEra Energy, becoming the first Virginia governor to formally intervene in a case before the State Corporation Commission. Dominion and NextEra filed their merger application with the SCC on July 15, formally launching the commission’s review. The merger would create the nation’s largest electric utility, serving roughly 10 million customers in Virginia, Florida, North Carolina and South Carolina. Joe McNamara of Roanoke County called for a special legislative session to consider extending Virginia’s review period. Linking the merger to affordabilitySpanberger said Thursday her merger review fits into her effort to hold down energy costs, pointing to more than a dozen energy-related laws she signed this year.