Today's conservatives support the idea of limited government, but they have increased government's size and power to new heights. They believe in balanced budgets, but they have boosted government spending, debt, and pork to record levels. They believe in national security but launched a reckless, ideological occupation in Iraq that has made us tangibly less safe. They have substituted religion for politics and damaged both.

In The Conservative Soul, one of the nation's leading political commentators makes an impassioned call to rescue conservatism from the excesses of the...