It's easy to argue over whether or not government subsidies are (i) desirable, or (ii) effective. What is far more important is the big picture. Norway has a much higher percentage of EVs on the roads than the USA because (i) most of Norway's population is concentrated in a few cities, and (ii) Norway's electricity grid can support EVs without falling over.

In the USA, neither of these factors apply. EVs are unsuited for long-distance travel, which makes up a significant percentage of all road miles in the USA. And the US electrical grid has been neglected for decades to the point where it can't even keep up with normal demand, never mind the huge additional load implied by EVs reaching a market penetration as low as 5%.

Thus, instead of subsidizing research and subsidizing factories, the true role of the US government would begin with investing in upgrading the creaky old unfit-for-purpose national grid. But because this would win no votes, it won't happen - and so there won't be any US capacity to charge EVs if they ever reach the point of comprising more than a tiny percentage of all road vehicles.