Super PACs and other lightly regulated political organizations are dumping hundreds of millions of dollars into American elections. What should be done about it? Unlike many candidates for federal or state office, so-called independent expenditure groups face no restrictions on how much individuals and groups can give to them. And thanks to several federal court decisions, including Citizens United v. Federal Election Commission, independent groups can spend unlimited amounts to influence elections. The public understandably worries about the political clout of wealthy groups—especially since donors often can hide their identities. Reformers have proposed various remedies: disclosure rules, the appointment of a liberal Supreme Court justice to reverse Citizens United, even a constitutional amendment to overturn that decision. Those long-shot strategies, however, are unlikely to create the kind of small-donor democracy that many reformers seek. Money, like water, will inevitably flow into the political system. Laws can’t do much to reduce the amount of money in politics; what they can change is where the money goes.