At this point, the senator's potential opponents in both parties need to find a way to make him look less daring and distinctive and refreshing. Republicans in particular should emphasize the senator's conventionally liberal voting record and policy positions that echo the tired old lefty nostrums of Ted Kennedy.
His pose as a "new kind of politician" has far more to do with his transracial identity and persuasive rhetorical style than it does with his political platform. With Hillary apparently determined to burnish her own centrist credentials, she will need to focus her campaign on demonstrating to primary voters and the public at large that Obama doesn't qualify as a real "New Democrat" in any sense of the term.
Michael Medved, best-selling author of "Right Turns" and "The Shadow Presidents," hosts a syndicated daily radio talk show focusing on the intersection of politics and pop culture. He blogs at http://michaelmedved.townhall.com/