Sen. Manchin is a supporter of nuclear power (see attached link)...what I see him doing is cooling it on the dash to wind and solar, while preserving some of the economic benefits his state gets now...at least for a little while longer. By his support for nuclear, he "gets it" about the future...IMO he's buying some time for what he might term as a "more orderly transition"...this is the VERY difficult part of getting off fossil fuels...not too surprising to me.
Baron is also right in that no one has yet stepped up to the plate and addressed the nuclear issue head on...this is why I'm in touch with my Congressman...and hope that everyone here will do the same...simple emails or calls from a lot of people will not go unnoticed.
P.S. Here's a news report from this morning on this issue of cuts to "The Bill"..https://www.nbcnews.com/politics/politics-news/clean-energy-program-likely-be-dropped-because-manchin-s-objections-n1281698
Link: https://www.ans.org/news/article-2824/sen-manchin-urges-biden-to-preserve-us-nuclear-fleet/