From whence came the word "propulgate"

Just a quick note: if my memory serves me correctly, no one guessed and I never revealed the source of the titular reference to the fake word "propulgate" in my previous post on ignorance. The term comes from the enjoyable political show The West Wing, in the episode "Disaster Relief". The vice president Bob Russell, who is not the sharpest member of the political cabinet, uses the term in a meeting to the chagrin of those on his side and confusion of those to whom he is speaking.

Note: I have also started labelling posts with titular references with the tag "Reference Game". While I have not gone back and retroactively labelled all those posts that came before, perhaps I will get around to it at some point. In the future, it should make things a little more organized.