the sticking point how is online poker different from say going to Nevada and playing poker in their venues? Case-in-point there is several line items in sever

the sticking point how is online poker different from say going to Nevada and playing poker in their venues? Case-in-point there is several line items in several US Federal income tax forms to report legal state gambling as income. the Nevada casinos sue banks to move winnings and losses..so why is that legal and not this?