Secret Service Director Mark Sullivan said the scandal involving agents and prostitutes in Colombia was not part of a 'systemic issue.' But Sen. Susan Collins said it 'was almost certainly not an isolated incident.'
Janet Napolitano, whose department oversees the Secret Service, said Wednesday there is no evidence of a pattern of indiscretion among agents. Nine have left the service in the wake of the recent prostitution scandal.
The chairman of a House committee investigating a Secret Service prostitution scandal predicted more firings as key lawmakers expressed confidence that the agency will effectively deal with the incident.