This is worth a quick peak. A recent study from Journal of Research Into Personality tracked children for 20 years and discovered
The whiny kids tended to grow up conservative, and turned into rigid young adults who hewed closely to traditional gender roles and were uncomfortable with ambiguity.
The confident kids turned out liberal and were still hanging loose, turning into bright, non-conforming adults with wide interests. The girls were still outgoing, but the young men tended to turn a little introspective.
Why? The author posits an interesting rational
He reasons that insecure kids look for the reassurance provided by tradition and authority, and find it in conservative politics. The more confident kids are eager to explore alternatives to the way things are, and find liberal politics more congenial.