420 isn't an insurmountably large a number - it's 8.4 per state (lets' round it up to 10 for redundency).

at an average cost of $10 billion per plant, that's 4.2 trillion dollars. I think the US has spent more than that on the iraq war and the afganistan war - 8 trillion according to https://www.brown.edu/news/2021-09-01/costsofwar - which could've paid for these 420 plants twice over.

Or, could build out solar, wind, and storage, leaving plenty over for universal health care, university education, clean drinking water and breathing air, mass transit projects, and even fixing bridges.

But US decided to invade Iraq and Afghanistan instead of any of those.

At least we've established a stable Afghanistan for generations /s