Hendrik Hertzberg in The New Yorker:
Obama’s argument is that he represents a new kind of politics; Clinton’s is that she can practice the old kind more expertly. John McCain will have plenty of allies and outriders eager to wield the blades sharpened in the campaigns of George W. Bush and Karl Rove. But McCain—whose sense of honor, however selective, is real—shows few signs of wishing to take up those weapons himself. Barring a much, much bigger than expected Clinton victory in this week’s Pennsylvania primary, Obama will face McCain in the fall. At least at the candidate-to-candidate level, hope and experience will square off at last. The battle might even be about ideas.
That would be a refreshing change.