President Obama's health-care bill is now moving toward final passage. The policy issues may be coming to an end, but the legal issues are certain to continue because key provisions of this dangerous legislation are unconstitutional. Legally speaking, this legislation creates a target-rich environment. We will focus on three of its more glaring constitutional defects.

First, the Constitution does not give Congress the power to require that Americans purchase health insurance. Congress must be able to point to at least one...