Cite as: 558 U. S. ____ (2010) 9 Opinion of the Court C Citizens United further contends that §441b should be invalidated as applied to movies shown through video-on demand, arguing that this delivery system has a lower risk of distorting the political process than do television ads. Cf. McConnell, supra, at 207. On what we might call conventional television, advertising spots reach viewers who have chosen a channel or a program for reasons unre lated to the advertising. With video-on-demand, by con trast, the viewer selects a program after taking “a series of affirmative steps”: subscribing to cable; navigating through various menus; and selecting the program. See Reno v. American Civil Liberties Union, 521 U. S. 844, 867 (1997). While some means of communication may be less effec tive than others at influencing the public in different contexts, any effort by the Judiciary to decide which means of communications are to be preferred for the par ticular type of message and speaker would raise questions as to the courts’ own lawful authority. Substantial ques tions would arise if courts were to begin saying what means of speech should be preferred or disfavored. And in all events, those differentiations might soon prove to be irrelevant or outdated by technologies that are in rapid flux. See Turner Broadcasting System, Inc. v. FCC, 512 U. S. 622, 639 (1994). Courts, too, are bound by the First Amendment. We must decline to draw, and then redraw, constitutional lines based on the particular media or technology used to disseminate political speech from a particular speaker. It must be noted, moreover, that this undertaking would require substantial litigation over an extended time, all to interpret a law that beyond doubt discloses serious First Amendment flaws. The interpretive process itself would create an inevitable, pervasive, and serious risk of chilling protected speech pending the drawing of fine distinctions

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