There is little nation-wide licensing or regulation of US gambling as a whole, with the exception of tribal gaming, which is authorized by the 1988 Indian Gaming Regulatory Act.
Each US States is in charge of regulating its own gaming entities. Most states have established gaming commissions or lottery boards to oversee the gaming activities in the state.
The legality of online poker and casino sites in the US also depends on which state you’re in. Some American states including New Jersey, Nevada, and Delaware have set up their own state-wide online poker and casino sites.
These state-run online casinos have the best safety and security for players because they’re subject to stricter licensing laws within the US. Some offshore casinos also accept US players, and those are regulated by various established e-gaming licensing bodies located around the world.