The Internet surpassed radio as a source for political news in the United States last year as more people went online to keep up with the presidential election campaign. So says a new report by the Pew Internet and American Life Project. Twenty-nine percent of U.S. adults used the Internet to get political news last year, up from 4 percent in 1996 and 18 percent in 2000. Television remained the dominant medium for most voters, but 18 percent said they got most of their political news from the Internet, compared with 17 percent who said they turned to the radio for their news.