Possible Clues:

• They protect the president (2 words)
• Presidential protectors
• President's protector ... and a hint to the circled letters
• The China nobody knows about is hidden from those doing the snooping
• President's protectors
• Government espionage department
• Government department that doesn't permit church doors to stay open?
• Business that deals in classified info?
• Cook serves rice, etc for spies
• Government department involved in espionage