The unfolding IRS scandal is a symptom, not the disease. For decades, campaign-finance reform zealots have sought to limit core political speech through spending limits and disclosure requirements. More recently, they have claimed that it is wrong and dangerous for tax-exempt entities to engage in political speech. The Obama administration shares these views, especially when conservative, small-government organizations are involved, and the IRS clearly got the message. While the agency must be investigated and reformed, the ultimate cure for these abuses is to unshackle political speech by all groups, including tax-exempt ones, from arbitrary and unconstitutional government regulation. Beginning in...