McCain is (not) a foreign policy expert.

hilzoy puts McCain's major faux pas under the microscope.

Money quote:

Note to self: if I ever run for President and decide to stake
everything on my understanding of one thing, I should familiarize
myself with the basic facts about it. I should be especially careful to
do this before I say something like this about someone who got it
right: "I don't know how you respond to something that is such a false
depiction of what actually happened."