Obamacare is designed for millions of uninsured Americans. Republican opposition to implementing it is unprecedented in political history — with one faction threatening a government shut-down. Others warn that's going too far. Even Democratic supporters are worried that starting a massive and complex new program will look like a "train wreck" to voters in next year's elections. With the October 1 "roll out" just a few weeks away, we look at some unexpected problems. Will they be offset when benefits start to flow? Are there political risks for both parties: Democrats, for giving the government too much power; Republicans, for taking their opposition too far?