While I'd like to see that too, I can understand why no one would pay him a visit for the following reason/s:
Although he's soliciting for classified information; if he was questioned, he would be receiving the attention he's seeking and draw more readers to his book. Additionally, while he has spouted words that he claims are code names, who knows what they are? IMHO think he's fishing.
I'm willing to be the FBI has a "post it" on this opportunist.