Access2Research (Wikipedia article) is a group campaigning for free and open access to research funded by U.S. taxpayers. They are behind the White House petition that the Wikimedia Foundation is supporting. The petition seeks to ensure via a mandate that research produced with United States federal funding can be accessed, free of charge, by anyone. The Wikimedia Foundation fully supports this goal, and the petition at the heart of it. (Read more about the context of this initiative.)