As midterm election polls bolster Republicans’ hopes of taking control of at least one chamber of Congress on Tuesday, five GOP senators penned letters to the leaders of 51 Big Law ESG practices Nov. 4 to promise congressional scrutiny of ESG activities that violate antitrust laws.

The senators—Sen. Chuck Grassley of Iowa, Sen. Tom Cotton of Arkansas, Sen. Marsha Blackburn of Tennessee, Sen. Mike Lee of Utah, and Sen. Marco Rubio of Florida—took aim at “collusive” ESG efforts to restrict the country’s supply of oil, gas and coal, which they claimed drove up energy costs and empowered U.S. enemies abroad.