There are books written about the differences between people who are predominantly "right-brained" or "left-brained." Handedness has a strong correlation with which side of the brain has more control of a person's behavior, outlook, talents, etc.
For example:
Global vs linear thinking
Receiving input through data vs feelings or intuition.
Musical and verbal skills
My worries: since right-handers had not won in a long series of elections, as a generality, were right-handers not 'some factor "x" enough' to appeal to a majority of American voters.
Bach, Rachmaninov, Ravel, Michelangelo, DaVinci to name a few, were left-handed! On this assumption alone, using the brain hemisphere division all those theories do not add up :) The aforementioned are proof! Which makes me wonder if you know (or anyone else) if Hitler was left-handed?