The Trump administration and several state governors on Friday urged the largest electricity grid in the U.S. to make the big technology companies pay for new power plants. Electricity prices have exploded in recent years on PJM Interconnection due in part to the data centers that tech companies are building to train and power artificial intelligence. The PJM grid serves more than 65 million people across 13 states and Washington, D.C. Its service area includes northern Virginia, the largest data center market in the world. The Trump administration and several states signed a pact that calls for tech companies to...