Add to ORKGGovernmental actions to restrain campaign falsehoods include federal and state statutes and judicial intervention. The article offers a taxonomy of campaign falsehoods and the different harms various kinds of falsehood generate and examines statutes adopted in sixteen states aimed at false speech about candidates, this article argues that efforts to control false speech about candidates (whether positive about the speaker or falsely negative about the opponents) face insurmountable First Amendment obstacles, as every court to consider such a statute has concluded. If the government becomes the arbiter of truth or falsehood, it is engaging in content-based regulation. Moreover, the article demonstrates how difficult it is for even a court to...