New York —

On the campaign trail last summer, President Donald Trump promised to swiftly cut electricity and energy prices in half if voters returned him to the White House.

“We intend to slash prices by half within 12 months, maximum of 18 months,” Trump said during a campaign rally in battleground North Carolina. “You will never have had energy so low as you will under a certain gentleman known as Donald J. Trump.”

Although gasoline prices have been low during the first year of Trump’s second term, electricity costs are rising uncomfortably fast for a variety of factors, including the insatiable power needs of massive data centers that serve as the backbone of the artificial intelligence boom.

As of the end of July, electricity prices had surged 5.5% over the prior 12 months,

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