The genius of democracy is the rotation of power, which forces the opposition to be serious -- particularly about things like war, about which until Jan. 20 of this year Democrats were decidedly unserious.

When the Iraq war (which a majority of Senate Democrats voted for) ran into trouble and casualties began to mount, Democrats followed the shifting winds of public opinion and turned decidedly antiwar. But needing political cover because of their post-Vietnam reputation for weakness on national defense, they adopted Afghanistan as their pet war.

"I was part of the 2004 Kerry campaign, which elevated the idea of Afghanistan as 'the right war' to conventional Democratic wisdom," wrote Democratic consultant Bob Shrum shortly after President Obama was elected. "This was accurate as criticism of the Bush administration, but it was also reflexive and perhaps by now even misleading as policy."

Which is a clever way to say that championing victory in Afghanistan was a contrived and disingenuous policy in which Democrats never seriously believed, a convenient two-by-four with which to bash George Bush over Iraq -- while still appearing warlike enough to fend off the soft-on-defense stereotype.

Brilliantly crafted and perfectly cynical, the "Iraq war bad, Afghan war good" posture worked. Democrats first won Congress, then the White House. But now, unfortunately, they must govern...