The reason they didn’t say anything is because most of the GOP leadership is also old and having similar problems but they likewise refuse to leave. See: Mitch McConnell.
McConnell is afraid of being outed next.
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What was he going to say?
Point out that Biden sometimes freezes?
Limpsey Graham quote from a few years ago :
” Joe Biden is as fine a man as God ever created “.
“they didn’t say anything is because most of the GOP leadership is also old and having similar problems”
I think it’s more like they didn’t say anything because most of them are financially benefiting from the Bidens’ unholy alliances with China, Ukraine etc. They didn’t want that gravy train to end any more than the RATs did.