The Combating Online Infringement and Counterfeits Act (COICA) was introduced in Congress this fall by Sen. Patrick Leahy (D-VT). It would grant the federal government the power to block access to any Web domain that is found to host copyrighted material without permission.
Opponents note that the powers given the government under the bill are very broad. Because the bill targets domain names and not specific materials, an entire Web site can be shut down. So for example, if the US determines that there are copyright-infringing materials on YouTube, it could theoretically block access to all of YouTube, whether or not particular material being accessed infringes copyright.