Krugman: "So what's our bitter partisan divide really about? In two words: class warfare. That's the lesson of an important new book, 'Polarized America: The Dance of Ideology and Unequal Riches.'"
The book analyzes statistical data to show that "for the past century, political polarization and economic inequality have moved hand in hand."
More: "[A] party whose economic policies favor a narrow elite needs to focus the public's attention elsewhere. And there's no better way to do that than accusing the other party of being unpatriotic and godless.
"Thus in 2004, President Bush basically ran as America's defender against gay married terrorists. He waited until after the election to reveal that what he really wanted to do was privatize Social Security."
Kicker: "[T]here isn't any center in modern American politics. And the center won't return until we have a new New Deal, and rebuild our middle class.