I’m not sure why the grid mix is relevant at this time.
electric car usage in the US is less than 1 million cars.
My point was that that the electricity can come from a variety of sources, including fossil fuels. Coal is dying. Natural gas is cheaper and much cleaner.
Fossil fuels (total) 2,651 63.5%
Nuclear 807 19.3%
Renewables (total) 713 17.1%