Two U.S. senators on Thursday fired the latest salvo in an increasingly active front against data centers and their energy use. Senators Josh Hawley and Elizabeth Warren sent a letter to the U.S. Energy Information Administration (EIA) asking it to collect details on energy use from data centers — and how that use is affecting the grid. The senators urged the EIA “to establish a mandatory annual reporting requirement for data centers and other large loads,” they wrote in the letter, which TechCrunch has viewed. “As electricity demand growth continues to accelerate after years of relative stagnation, the lack of reliable, standardized data on large load energy consumption poses significant risks to effective grid planning and oversight.” Wired was first to report on the letter. The letter isn’t the first move by politicians to try and place new regulatory requirements on data centers. Sen. Bernie Sanders and Rep.…