What is at stake in the debate over health care is more than the mere crafting of policy. The issue is now the identity of the Democratic Party.

By now we know that Democrats can bail out traditional Republican constituencies like Wall Street, but it remains to be seen whether they can enact a convincing version of their own signature issue, health-care reform.

At this point, it's fair to ask whether Democrats remember why health care is their issue in the first place. As health-care debates always have done, this one has pushed to the fore all the big questions about the rightful role of government, and too many Democrats have sought to avoid them with mushy appeals to consensus and bipartisanship. The war is on and if Democrats want to win they...