From Social Security, to intervention in the sad case of Terri Schiavo, to the appointment of conservative federal judges, every major debate positions the parties in the same way: Republicans are on offense, Democrats on defense. The debate on the federal budget isn't about whether to raise taxes to reduce the deficit, it's over how much more to cut taxes. Washington isn't examining how to expand coverage for those without health insurance, but whether to cut the Medicaid program that provides the central strand in our society's safety net. Democrats are furiously laboring to prevent Bush from carving out private...