It seems to me that companies like GE and Westinghouse have tons of money. Add that to the billions pro-nuclear folks have in SV and you've got quite the war chest to fund effective pro-nuke campaigns.
[0] https://www.nytimes.com/2017/03/29/business/westinghouse-tos...
[1] https://www.usnews.com/news/business/articles/2022-07-18/ge-...