STAT reviewed decades of Trump’s on-air interviews and compared them to Q&A sessions since his inauguration. The differences are striking and unmistakable.My Hypothesis-
Tooth and Nasal infections (go figure)
Since the campaign, however, he has been getting less and less sleep and more and more memory problems.
His sinus infection is affecting his entire head now, and he really can't think too well anymore.
update: Plus I think they're drugging him. Something like Benedryl maybe. He's very sleepy.
That's why he was grabbing Melania on the airplane stairs...