“MSNBC finally had enough of him making them all look like benighted asses”
Probably; it is their loss. He is a brilliant man, a proud patriot, a conscientious Christian, and I guess a few other things that would keep him off any network that so openly is opposed to the American people and their traditions.
Pat has the most accurate and pithy explanation for Nixon's resignation and I'm sorry but I will have to paraphrase as I lack the time to look it up.
On Pres Nixon's downfall:
“He paid the price for trying to help an old, dear and loyal friend.”
—that friend being AG Mitchell who was about to be crucified by the Liberal Democrat Watergate Witch Trials.