Nick Rogers, as you suggest, McConnel has probably had dozens of similar lapses off-camera.
A sales associate working a department store tie bar would be let go.
But McConnell, Feinstein, and others in public positions are given special job protection when they are obviously impaired.
As for Biden, he is given protection by enablers, those with vested interests, and people who can't imagine another doing the presidential job.
"I don't know enough to know" was Biden's response to Mitch's episode.
I invite you to read "Donald Trump, the Town Hall Clown?" where I refer to the age issue in both parties.
Best.