PHILADELPHIA—Ninety-eight years ago, the nation’s largest power grid operator was founded here by utilities serving Pennsylvania and New Jersey. On Monday, Pennsylvania Gov. Josh Shapiro threatened to pull his state out of the coalition.

“It is time to get serious about making significant reform,” Shapiro said, at a conference he convened with representatives from all 13 states now in the grid to “chart a new course” for operator PJM Interconnection.

“If PJM refuses to change, we will be forced to go in a different direction,” he said.

Pennsylvania is the largest energy producer in the grid. Its absence would impact electricity consumers across the region, which stretches from Illinois to North Carolina. • ICN Weekly Saturdays Our #1 newsletter delivers the week’s climate and energy n

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