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.

A dried up old clown trying to be relevant
Letterman thinks someone is ignorant other than him?!
I guess you think you’re a freakin genius, well you just proved you’re not even smart.
Who cares what he has to say?
Celebs + politics= Stupidity
Letterman is a mean spirited idiot
Old fool !!!!!!!
Your insults to my President has made me lose all respect for you. Shame on you for trying to undermind the will of the people.
Somebody should ask this$#%&!@*how President Trump effected his life. Is he on food stamps now or in public housing? Why is this dumbass so upset with Trump???
Wish Letterman were more intelligent.