It is definitely worth mentioning. I wonder, however, whether it is the opinion that is "inheritied" or the basic word view that then leads one to synthesize a simiar political opinion.
My first political memory is of a radio announcer sobbing as he announced the death of Roosevelt. I looked over at my parents - who also broke down. That experience has rendered me incapable of looking at FDR as I do other presidents - even JFK.
Other people may not have such powerful single events in their past but childhood memories are different than all others.
I'm not sure where to go with this - but I know it's important.