This isn’t a bad effort to pursue, but it won’t mean anything in practicality. The car companies won’t actually make changes to their plans unless they can be sure that the changes will stick after Trump leaves office, and with the environmental zealotry on display on the left, this executive effort would be rescinded purely out of spite as soon as a democrat reached office. Secondly, though sort of on the same line, California would have no incentive to respect the grandfathering of any non-conforming vehicles sold during the possible years where they were ok to be sold within California. Registrations could be refused and knowing this would be possible, Californians wouldn’t buy them. That said, it would be worth pushing through the courts just to find out where federalism’s lines can be drawn for interstate commerce.
Good! That will make GovGav’s moosey hair droup.