California's Ready to Retaliate if Trump Cuts Auto Rules, Sources Say -
"As the Trump administration begins to dismantle Barack Obama's ambitious auto efficiency regulations, California is said to be poised to retaliate by doing something that automakers have feared: de-coupling the state's rules with those set in Washington."
Why this is important: California is the beneficiary of a special vehicle emissions rule that allows it to set more stringent requirements than the rest of the nation, and allows other states to opt in. Car companies prefer uniform standards and hate the idea of manufacturing different cars for parts of the U.S....
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