Legislation to restore a federal high-capacity magazine ban has been repeatedly introduced by Democrats in the United States Congress since the expiration of the Federal Assault Weapons Ban, especially in the wake of mass shootings in the United States in which high-capacity magazines were used, including the Tucson shooting (2011), the Aurora, Colorado movie theater shooting (2012), and the Harvest music festival shooting (2017). These efforts have been thus far unsuccessful. The federal Keep Americans Safe Act, which would restore the ban on new magazines that hold more than 10 rounds, passed the House Judiciary Committee in September 2019.