Looking at this year's Republican primary field, Sigmund Freud might have divided the candidates into superego and id.
The id is all about passion and zeal — and that defined most of Romney's challengers: Minnesota Rep. Michele Bachmann, Texas Gov. Rick Perry, businessman Herman Cain, former Pennsylvania Sen. Rick Santorum and former House Speaker Newt Gingrich all made pulses race.
The superego is more measured.
This much smaller column consisted briefly of former Utah Gov. Jon Huntsman, and more notably, former Massachusetts Gov. Mitt Romney.