Shapiro threatens to pull Pennsylvania out of PJM over electricity prices

Shapiro’s letter marks a sharp escalation of his dispute with PJM, the largest U.S. wholesale power market and transmission coordinator, serving 65 million people from the Atlantic Seaboard to Chicago.

The risk of more power price escalation “threatens to undermine public confidence in PJM as an institution,” Shapiro said in his letter to Mark Takahashi, chair of PJM’s board of managers.