"The Trump administration's aggressive deregulatory agenda has run full-speed into a blockade set by Democratic attorneys general.
Led by New York and California, the states have challenged virtually every effort by EPA and other agencies to walk back Obama-era rules like the Clean Power Plan and Clean Water Rule.
And they are winning.
Republican attorneys general similarly sued over many rules that came out of Obama's EPA. But the Democrats have filed significantly more lawsuits, and they have been more successful — winning 80% of the cases thus far, according to an analysis of the challenges, which often take years to work their way through the courts."