No one could have said it any better, 
He not only sold out Iran, he set us on the path that culminated in 9/11. The Shah (and other experts on fundamentalist islam) told Carter that if Iran fell to the Fundamentalist it would cause serious and long term problems for the Middle East. Imagine Iraq today if Iran were an American ally. There would never have been an Iraq/Iran war, and invading Iraq might not have been necessary. We are still paying the price for Carters incredible inability to govern or think beyond the moment. How we survived this monumentaly stupid man is beyond comprehension. He is without a doubt the worst president we will ever have.
He is without a doubt the worst president we will ever have!
Hillary Clinton is following his path
"...He is without a doubt the worst president we will ever have..."
He was the Manchurian Candidate.
Think of it. Think of all the damage done from our three biggest spy threats: the Rosenbergs, John Walker & Aldrich Ames - now combine all their damage and compare it to the effects of the carter presidency (and yea, even post-pres):
give away the Panama Canal (weaken our strategic position)
Cutting back of weapons systems
Iran - the Shah - let the genie out of the bottle (biggest effect.
(And during the post-pres phase, he's only managed to...)
unauthorizedly act as de facto SecState and key broker of the nuke-reactor-for-peace agreement with NKOR.
Blesses rigged election in venezuela to this generation's Castro.
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so, who do YOU think caused more damage?
No one could have said it any better,