A Secret Service agent shamed the United States after a wild night of babes and booze that ended in an argument with a Colombian hooker over as little as $47. One of 11 elite agents assigned to ensure President Obama’s protection at a summit meeting in Cartagena, Colombia, was busted after his lady of the evening refused to leave his hotel room in the morning without her fee. That woman was one of 11 hookers hired by the agents — and the only one who hadn’t left Cartagena’s swank Hotel Caribe,...