Even though he had an appointment to the University of Virginia in his pocket, Pop several times extended his stay at the White House to help out with the struggles over inflation and recession, and never once publicly said a word against Nixon.
Pop has never been to the White House at all.  
mnli hypothesis: Pop has never been to the White House at all.   premise: Even though he had an appointment to the University of Virginia in his pocket, Pop several times extended his stay at the White House to help out with the struggles over inflation and recession, and never once publicly said a word against Nixon.