The best mass-market article I've read on the topic was in the NYTimes (those who don't read it may be surprised to learn that it actually has very strong business reporting) that noted this with regards to the industry generally:

"Slowing demand for electricity and tumbling prices for natural gas have eroded the economic rationale for nuclear power, which is extremely costly and technically challenging to develop." https://www.nytimes.com/2017/03/29/business/westinghouse-toshiba-nuclear-bankruptcy.html?_r=0

Nothing I've read on the matter, other than maybe some political pieces not really informed about the industry or even interested in exploring it, have suggested overregulation as an important contributing cause, much less the primary driver, of nuclear's current troubles. Which troubles, as I've mentioned I think are a shame because I think nuclear should be a big part of our energy future.