Specter won't rule out run as an independent

“I’m staying a Republican because I think I have a more important role to play there,” he said. “I think the United States very desperately needs a two-party system. … And I’m afraid that we’re becoming a one-party system, with Republicans becoming just a regional party.”…

“It’s pretty hard to run without a party,” Specter said. “It’s always something that could be a possibility. But then I wouldn’t be in the Republican caucus — wouldn’t have quite the standing as a Republican.”