Must be a Sussex County, Virginia thing. Harumph, Harrumph.
Interestingly enough, "harrumph" (or harumph for that matter) is specifically a description of a sound, such as clearing of the throat, a huff, grunt or snort uttered for the purpose of showing displeasure without saying much.
It is similar to when flatus is expressed in public. We observe the volume, duration, tonal quality, and olfactory properties, but choose a single word to describe all of these descriptive properties.
Winston Churchill was well known for harrumphing, but very likely seldom ever uttered the word "harrumph".
As far as Winston Churchill responding to he other topic, my bet is that he just laughed just as all real men do.