In a five-to-four ruling, the Supreme Court in Citizens United v. FEC invalidated two provisions of the Federal Election Campaign Act (FECA). It struck down the long-standing prohibition on corporations using their general treasury funds to make independent expenditures. As a result of the Court’s ruling, it appears that federal campaign finance law does not limit corporate and, most likely, labour union use of their general treasury funds to make independent expenditures. This book examines campaign finance with its relation to the Citizens United States Supreme Court case.