I could not, in good conscience, support a candidate for President who would withdraw American military presence from the globe. The United States plays a pivotal role in world peace. We may not always do the best thing or even the right thing, but over the long haul, American presence around the world has been beneficial for all humanity, during the past hundred years.
There is quote in the mini-series John Adams where the title character and Thomas Jefferson are talking about the French Revolution, and I think that this exchange captures Jefferson's attitude toward foreign policy exactly.
"Thomas Jefferson: Well... to the revolution.
John Adams: Whose [France or America's]?
Thomas Jefferson: They are one and the same, John. Are they not?"
That fits my view of the world, exactly. We ought to do whatever is reasonable to support all people around the world yearning and fighting to be free.