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First of all, I think the commenter is right -- McCain's quote is not "outrageous" on its face. But what it shows is a fundamental disagreement on policy. I watched Susan Rice, Obama's senior foreign policy advisor, respond to McCain's quote. She correctly pointed out that this is the latest example of McCain misunderstanding the situation in Iraq. The word Rice used was "confused." She pointed out that McCain was "confused" about the difference between Sunni and Shia and had to have Joe Lieberman correct him. She noted that McCain was simply wrong when he claimed that the number of troops in Iraq had been "drawn down to pre-surge levels."
McCain's latest comments were not false, but they did demonstrate a lack of understanding. We -- the public and the military -- were told that this war would take a few months. Five years later, we still have 150,000 troops committed there, with no sign that anything is being done to bring them home. Meanwhile our government is banging the drums for more war, and getting further committed to the war we never completed in Afghanistan.
McCain's comments show a difference in policy. The commenter is right that the end to hostilities is important, but that end is no where in sight. After five years of stretching out our military, after four tours of duty, after over 4,000 deaths and no apparent political progress, saying that bringing the troops home is "not too important," may not be outrageous, but it sheds light into McCain's thinking. And when, as Rice described, it is presented along with several "confused" and false statements, it shows that McCain's perceived strength is really just bad policy.