In a wide-ranging letter, four U.S. senators called for improved transparency and accountability from ISO-NE, and asked the RTO to increase its efforts to facilitate the clean energy transition.

Sen. Ed Markey has set his sights on ISO-NE, accusing the grid operator of being part of an "oil and gas conspiracy."

Sen. Bernie Sanders assured Vermont energy committees that the budget reconciliation bill would provide the funding they need for climate initiatives.