I don't think it's possible. Instead try a social engineering approach where you have enough broad-based support for the concept that there is pressure on the government not to shut it down.
Wikileaks has been very smart lately in the way that it has expanded its own PR reach before delving back into controversial material.
If "poker" doesn't have broad enough support—enjoyed by millions in the US across the political spectrum, large television presence—I don't know what does.
Wikileaks does not continue to operate because the US backed off, it continues to operate because they took the appropriate technical measures.
I guess I disagree. There is a large, religiously derived political interest group which opposes gambling on moral grounds, which has been influential enough to have it banned in most states.
Wikileaks is still teetering on the edge of being declared a terrorist organization. It's small things like mainstream newspapers willingness to collaborate on reporting, mainstream intellectuals speaking out in support, etc., that has prevented the USG from destroying it.
Assange has been clever too and deserves much credit, but I think recent manifestations of that cleverness are sociological rather than technical.
Wikileaks has been very smart lately in the way that it has expanded its own PR reach before delving back into controversial material.