Foreign policy Obama's 'sweet spot' or vulnerability?

Four years ago, then-Sen. Barack Obama ran for the White House as the foreign policy novice -- both in the primary against Hillary Clinton and Joe Biden, and the general election against John McCain.
That inexperience, it turned out, proved not to be an Achilles' heel.
Monday night, as commander in chief, Obama goes toe-to-toe in the third and final debate with Republican challenger Mitt Romney, and takes the stage as the supposed pro -- or as Romney surrogate John Sununu put it, Obama "thinks this is his...