Sen. Tom Carper, top Democrat on the Environment and Public Works Committee, issued a statement reacting to the Environmental Protection Agency’s letter Sept. 26 to California, purportedly expressing concerns about state-level environmental enforcement.

This move is the latest in a rash of retaliatory actions the Trump administration has taken against California since the state entered into a voluntary fuel economy agreement with four major automakers.

“This is not about improving water quality or protecting public health, this is about the president retaliating against the state of California, which he views as his political enemy, for striking a deal with four major automakers on car emissions standards — and because he fears more automakers may soon join that deal,” said Carper. “President Trump is governing with a mob boss mentality and, clearly, EPA Administrator (Andrew) Wheeler is following orders. Between EPA’s letters to California, EPA and DOT repealing California’s authority to set its own clean air standards — while simultaneously accusing the state of having dirty air — and DOJ launching its bogus antitrust ‘investigation’ against automakers who work with California, these acts are an abuse of power by the president, plain and simple.”