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.

Look who’s talking. A has been comedian I never found funny or smart. A cheater in his own backyard.
Never did think he was 100% sane.
Poor old letterman! Guess he gets a little cranky, when he’s not screwing (literally) his female staff members!!
Letterman is a mad man! Looks horrible!!
Letterman is a ignorant old pos. Who cares what this gutter troll thinks.
It take one to know one Dave.
Why do Hollywood actors dancers singers what ever think they know more than everyone else. Stick to entertainment you know like trained monkeys you can’t even run your own state
Letterman looks more disturbed by the week. Scary.
He was on TV that makes him an expert on nothing.
He’s is a moron.