This secret passage comes from Bo (formerly known as Charlie) the Portie’s diary:
I reached Barney outside of Houston, where he was hunting with George W. Bush.
“Charlie, I think it’ll be easier for you,” Barney confided, over the sound of distant buckshot. “My guy used to ask me questions about foreign policy when nobody was around. Then he would get bored and say I was a Scottish terrier, so I should chase him around the West Wing while pretending to be the Loch Ness Monster. It was exhausting.”
I nervously licked my paw as Barney continued.