Trump Plaza Hotel and Casino stands behind Pacific Avenue in Atlantic City, N.J. (Ron Antonelli/Bloomberg)

The news last week that Trump Plaza is going to close — and that it was one of four Atlantic City casinos that could close this year — offered a pretty stark illustration of the onetime gambling mecca’s precipitous decline. So what is to blame? Is it, as many people believe, the emergence of casinos in other states across the Mid-Atlantic, a surge in options that let people gamble closer to home? That is one theory. Another theory, offered by the head of an association that represents casino companies, is that too much taxation and regulation is to blame. Annys Shin has more here.