Idle musing: wonder what percentage of people from the wealthy world who backpack internationally and spend time in poorer countries vote progressive after they've returned to their native lands. I'd guess it's an overwhelming majority, but I'd love to see stats. Is that even a researched demographic? 

 @d72d5211 Is it a large enough population to sway politics anywhere?

Also it'd be hard to show which way the cause and effect goes, as I'd expect those voting progressively to be more likely to opt for such experiences when traveling.