The North American Supergrid is a proposed  high voltage direct current, largely underground transmission network that would extend across the lower 48 states, thus creating a national electricity market. The Supergrid would create a resilient backbone to the existing system, making clean renewable energy competitive with fossil fuel-generated energy in open markets, creating hundreds of thousands of jobs for several decades, increasing U.S. domestic energy generation, and securing the nation’s electrical transmission infrastructure against modern threats. Further research will soon extend this infrastructure plan to include parts of Mexico and Canada.