Call him Al Gore, media baron. The former vice president is close to striking a $70 million deal to acquire Newsworld International, a tiny cable network owned by French media giant Vivendi Universal, media sources said. Gore and his backers want to turn the digital channel into a liberal-leaning network. His partners include ex-Democratic fund-raiser Joel Hyatt and media investment banker Steve Rattner, who's said to be lining up financing. Carried in just 20 million homes, NWI airs newscasts from around the world, including reports from the Canadian Broadcasting Co. The net is part of Vivendi Universal Entertainment, the show...