To help combat illegal immigration across the border with Mexico, Romney has said that the U.S. must erect a fence along the entire 2,600 mile border, equipped with technology to detect attempts to breach the barrier, and outfitted with adequate numbers of border patrol agents. Romney's positions were given mixed reactions and ratings by anti-immigration groups. Numbers USA gave him a D grade for his positions in 2011 and a 64% score in his 2012 campaign. ProEnglish, which seeks to make English the official language of the United States, gave Romney an overall 73% grade.