by Robinson Meyer, The Atlantic
One of the White House’s most consequential environmental rollbacks may be in self-inflicted legal danger.
In trying to freeze gas-mileage rules for new cars and trucks, Trump officials have hit an unusually damaging snag: They seem to have messed up their math homework.
The Trump administration’s official case for repealing car fuel-economy rules is riddled with calculation mistakes, indefensible assumptions, and broken computer models, according to economists, environmental groups, and a major automaker. The errors may seriously endanger the rule, hampering the White House’s ability to prove the proposal’s benefits exceed its costs and raising questions about whether it can survive an almost inevitable court challenge.