Extra-judicial Actor Induced Change in Supreme Court Legitimacy

Although public support for the U.S. Supreme Court is generally stable, various cues and heuristics affect how individuals derive political opinions. And while the Court is capable of conferring support on its own decisions, information from extra-judicial sources—such as presidential candidates—may have a potentially (de)legitimizing influence on individuals and their attitudes. Using a survey experimental design, I manipulate the source of negative statements about the judiciary to determine whether extra-judicial actors are capable of altering support for the Court and, if so, whether it is via ideological updating or is a purely affective response. I find that political actors unrelated to the Court are capable of producing change in attitudes and that those changes are affective. Those positive toward the cue source decrease their level of support upon hearing indicting statements, and vice versa, but individuals do not alter their perceived ideological distance from the Court. This finding has implications for the stability of the support on which the Court relies to expect compliance with its rulings, as well as how affective attachments to groups and their representatives influence institutional loyalty.