While looking up "pleonasm" I noticed "plenum". Compare
definitions 1 and 2. Can it be that a politcal meeting may be called a "plenum" because it is full of hot air?

plenum ['pli¢°nəm]
noun
(plural: -nums, -na [-nə])
1 an enclosure containing gas at a higher pressure than the surrounding environment

2 a fully attended meeting or assembly, esp. of a legislative body

3 (esp. in the philosophy of the Stoics) space regarded as filled with matter
Compare: vacuum [1]

4 the condition or quality of being full
[ETYMOLOGY: 17th Century: from Latin: space filled by matter, from plenus full]

Can it be that a politcal meeting may be called a "plenum" because it is full of hot air?

Especially so if it's in Boston! [holding nose, gasping for air-e]

Boston doesn't have many superlatives to claim these days.
I wasn't aware that Boston politics was notable in any respect. No longer can it be said that the Lowells speak only unto the Cabots, and the Cabots only unto God.
And as far as I can tell Slip-a-quick-dick does all
his talking in Washington. I haven't paid any attention to Kerry.