One of the judiciary\u27s self-imposed limits on the power of judicial review is the presumption of constitutionality. Under that presumption, courts supply any conceivable facts necessary to satisfy judicially created constitutional tests. The Supreme Court has given three reasons for the presumption: to show due respect to legislative conclusions that their enactments are constitutional, to promote republican principles by preventing courts from interfering with legislative decisions, and to recognize the legislature\u27s institutional superiority over the courts at making factual determinations. This Article argues that the presumption does not sensibly implement these reasons. It further argues that these reasons equally, if not more st...