Two months ago in the midterm elections, Democrats wrested control of Congress after 12 years of increasingly conservative Republican leadership. Since then, much of the media has stuck to their script of the new breed of "centrist" Democrat, who couldn't have been elected unless they had moved to the "center."

But what constitutes the political "center" and who defines its location?

The key concept for the punditocracy as the presidential election season gets underway...