McCain on the Threat from Iran

I found this to be one of the more illuminating exchanges during Friday's debate on foreign policy:

LEHRER: Senator McCain, what is your reading on the threat to Iran right now to the security of the United States?

MCCAIN: My reading of the threat from Iran is that if Iran acquires nuclear weapons, it is an existential threat to the State of Israel and to other countries in the region because the other countries in the region will feel compelling requirement to acquire nuclear weapons as well.

McCain didn't actually address the question - the threat to the United States - until the end his two minute answer, saying that Iran supports anti-American insurgent elements inside Iraq.

I guess he hasn't heard of the looming Iranian EMP threat.