The early Letterman comedy reflected his mid-western roots, but when he realized he couldn't beat Leno in the ratings game, Letterman went gonzo left - a man searching for a fan base.
His anger was no longer subversive and clever, it was bitter and mean-spirited and palpably real. He was a jerk playing to his loyal audience — urban, cynical, elite, Blue State jerks. The humble, self-deprecating Dave had become the nasty, arrogant Letterman, an unrecognizable bully who reveled in pulling the wings off those he saw as something less.
http://www.breitbart.com/big-hollywo...-indiana-soul/