As the 2008 Republican primary campaign turns ugly, have you noticed that each pair of combatants - Romney and Giuliani in one ring, Huckabee and Thompson in the other - comes from the same region? Romney and Giuliani are squabbling for the opportunity to represent the GOP's (steadily shrinking) northeastern contingent, while Huckabee and Thompson both want to speak for the party's (ever-expanding) southern wing. Meanwhile, the only western candidate in the top tier is on his own, sometimes entering the fight by taking a swing at Giuliani, most of the time preparing to reap the benefits if the other candidates take each other down fighting.