[BillyBoy]

Yes, he was good (at least entertaining, that is) in the ‘80s. Something happened to him in the time since, or more likely, his mask merely fell off. <<

I think the real David Letterman was killed about 1992 or so and replaced by Rob Reiner in disguise. Note recent photos of the now retired "David Letterman" in public:

[SamAdams76]

He's younger than Donald Trump but looks 20 years older.

Also, he's nowhere near successful as Donald Trump.

[atc23]

Alcoholic (Letterman)