The tentacles of the IRS reach very far. So far that foreign banks will not open or maintain accounts for Americans.
But it could be the Justice Department. It was the DoJ that shut down online poker a couple of years ago, and they were domiciled abroad as well.
What? Intrade was stubbornly pro Obama the entire campaign, and everyone who was saying Romney was going to win also said you could make a killing at Intrade.