A metaphor for the entire time this corrupt, mendacious, incompetent grifter has spent occupying the WH.
Indeed.
What the hell is a sand bag DOING in the middle of a Presidential stage ?
SOME graduate made good on his practical joke and is a wealthy man right now.
"I sandbagged the President of The United States on public T.V. !"
https://www.thefreedictionary.com/sandbagged