Chapter 3 aims to gauge both the reality of, as well as public opinion on, the central issue of corruption. It investigates public opinion on corruption among elected officials, source of corruption, effectiveness of laws and regulations in mitigating corruption, support for campaign finance reforms, etc. The data strongly suggest that people think corruption is rampant despite limited evidence that quid pro quo corruption is anything more than a minor problem. This fundamental attitude has not changed much in the wake of the Citizens United decision. Furthermore, they believe the problem is mostly intractable and that most of the commonly proposed reforms of the campaign finance system will not work. Nevertheless, they still support these reforms. Moving from simple descriptive data to more associational analyses, this chapter also explores the effect of campaign finance laws on campaign spending and then the effect of both on corruption attitudes. The results are not what the Court would have expected.