Does Donald Trump have an imaginary friend?

Remember back in February, when Donald Trump spoke at a conference about his 'pal' Jim, and his opinion on Paris? In an anecdote, Jim told Trump "I don’t go there anymore. Paris is no longer Paris." So who is Jim, and what does he have against the city of lights? No one has successfully tracked Jim, and now people think he made Jim up! People are speculating Trump used Jim to push his opinion on France becoming less safe due to lax immigration policies... However, until Jim is identified, it will remain a ongoing mystery...