Open factories in Red Districts, employ a statistically significant amount of residents, and then the Congressmember will flip.
That's the issue. Most of those parts are manufactured in an automated manner already.
An ICE vehicle has more parts, and less portions of the supply chain automated.
This translates to more jobs for the various OEMs.
Any attempt at transforming an ICE OEM to an EV OEM translates to job losses as well as lower margins [0], which is why both unions (eg. UAW) and ICE manufacturers (eg. Toyota in Japan) have been lobbying against EVs.
These D- Congress members are all in districts where victory margins were relatively low and where the downstream impact of EV manufacturing could have a similar impact to what NatGas and Renewables had on Coal and Oil.
[0] - https://www.ismworld.org/supply-management-news-and-reports/...