When the Supreme Court introduced the "secondary effects" doctrine to allow for zoning of adult businesses, critics fell into two camps. Some, like Justice William Brennan, predicted dire consequences for the First Amendment, particularly if the doctrine was used in political speech cases. Others, like Professor Laurence Tribe, predicted secondary effects analysis would be limited to sexually explicit speech and would not threaten the First Amendment. The modern consensus is that the doctrine

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... s, in fact, been limited to cases about sex. Recent cases demonstrate, however, that the impact of the secondary effects doctrine on the First Amendment has been broader and more insidious than is generally understood. It is true that courts usually avoid expressly invoking the doctrine outside the adult speech context, instead applying the standard content-neutrality analysis. But that "standard" neutrality analysis has actually been quietly warped over the past three decades by the influence of the secondary effects doctrine. These doctrinal distortions have occurred without anything like the outcry generated by the prospect of express use of the doctrine in political speech cases. The results of this doctrinal shift are striking, with some courts treating as "neutral" laws that deliberately discriminate among speakers and messages on public sidewalks, in issuing parade permits, and even in what political messages can be worn on T-shirts. This Article (1) describes the manner in which the standard neutrality analysis has been warped by the secondary effects doctrine, (2) demonstrates the dangerous First Amendment effects of those changes by examining several recent cases in which courts have allowed contentbased or even viewpoint-based speech restrictions to stand, and * Associate Professor of Law at The Catholic University of America, Columbus School of Law; Senior Counsel, the Becket Fund For Religious Liberty. We would like to thank Will Haun, Kristen Morgan, Stephen Braunlich, and Brendan McNamara for research assistance. Thank you also to my colleagues for their support, and to Kevin Walsh for his helpful insights. The views expressed here are my own.