Casino Operators Face Shutdown in Atlantic City

Harrah's is currently spending about $500 million to expand its casinos in the city, while Trump is spending $250 million to expand the Taj Mahal site. The Borgata still has another $325 million expansion set to open in late 2007.

"People who invest a lot of money want stable environments," Klatzkin says.

Boyd Gaming shares fell 47 cents, or 1.2%, Monday to $39.89, and MGM Mirage rose 3 cents to $40.83. Harrah's fell 68 cents, or 1%, to $70.50; while Trump shares rose 13 cents to $20.28.