No they don’t ‘buy it’. There may be lots of voters who will never vote for any republican, but almost no one thinks Biden is mentally competent anymore.
You seem to be believing the WH’s spin.
Not me FRiend...I don't believe ANYTHING that comes out of ANY politicians mouth...or their flying monkeys.
Most people vote for (or against) the party, not the man.
There are lots of conservatives who wouldn't vote for Donald Trump (the man) either.