Well, if you don’t think clutching a pen in a hand that you don’t write with during a debate is important then I can’t explain it to you.
But others might be looking for signs of Parkinsons or other physical issues. Clutching a pen in a hand you don’t write with could be about keeping it from trembling.
Thanks. I really didn’t have a clue what it was all about, but the Parkinson deal could make sense. Or it is a prop of some other kind.