The Stop Online Piracy Act (SOPA) was a controversial proposed United States congressional bill to expand the ability of U.S. law enforcement to combat online copyright infringement and online trafficking in counterfeit goods. Introduced on October 26, 2011, by Representative Lamar Smith (R-TX), provisions included the requesting of court orders to bar advertising networks and payment facilities from conducting business with infringing websites, and search engines from linking to the websites, and court orders requiring Internet service providers to block access to the websites. The proposed law would have expanded existing criminal laws to include unauthorized streaming of copyrighted content, imposing a maximum penalty of five years in prison.
Proponents of the legislation said it would protect the intellectual-property market and corresponding industry, jobs and revenue, and was necessary to bolster enforcement of copyright laws, especially against foreign-owned and operated websites. Claiming flaws in existing laws that do not cover foreign-owned and operated websites, and citing examples of active promotion of rogue websites by U.S. search engines, proponents asserted that stronger enforcement tools were needed. The bill received strong, bipartisan support in the House of Representatives and the Senate. It also received support from the Fraternal Order of Police, the National Governors Association, The National Conference of Legislatures, the U.S. Conference of Mayors, the National Association of Attorneys General, the Chamber of Commerce, the Better Business Bureau, the AFL–CIO and 22 trade unions, and the National Consumers League.
Opponents argued that the proposed legislation threatened free speech and innovation, and enabled law enforcement to block access to entire Internet domains due to infringing content posted on a single blog or webpage. They also stated that SOPA would bypass the "safe harbor" protections from liability presently afforded to websites by the Digital Millennium Copyright Act.