David Letterman’s 33-year run on late-night television was marked by his acerbic sense of humor.
Upon retiring in 2015, he’s undergone a metamorphosis into someone almost unrecognizable from the more comedic guy people watched on the “Late Show with David Letterman”.
He’s grown a full beard, which coupled with his balding head, makes him look like a guy wanting to moonlight as a department store Santa Claus.
But beneath that kindly-looking exterior lurks a clearly bitter and troubled man, as evidenced by recent nasty remarks about President Donald Trump.
It’s spelled out on the next page. See how the funny guy seems to have lost his sense of humor.

Ah, I’d place my money on Letterman having the lower IQ.
Letterman is demonstrating his mediocre intelligence.
Sad sad old fart Letterman trying to stay relevant.
Very early in his career, he was much funnier. And conservative.
Trump’s obviously smarter than you Dave!
So agree screw Hollywood you are to entertain me could care less what you thinl
Never watched this hollyweird chump . Does he think he matters
Nuts. Trump is awesome.
I never liked your show and hated the way You put people down like you knew it all. You sir were sickening then and you are so now.
Give this demented old clown a shot of thorazine so he will just go sit in the corner and STFU.