Given there’s suggestions he has Parkinson’s or has dementia, it might also be the medication. Something like haldol, even in low doses, will make him sleepy.

TBF he’s old. I had trouble staying awake in class when I was in my teens and twenties. No surprise an old man has similar issues during a long day in court.

Perhaps if he hadn’t gone around calling his opponent ‘sleepy’ for years on end, people would have been more charitable and assumed he’d simply slept poorly.