It's no secret that Democrats need the American economy to stay strong until Election Day 2016. Right now the biggest threat to that is China. No one knows exactly how much China's economy is slowing down. But there's wide agreement that the country isn't growing at 7% like the government says. China's hiccups are being felt around the world. They've already sentCanada and Brazil into recession and caused the U.S. stock market to plunge dramatically at the end of August. There are fears the world economy could get worse in the coming months and hurt the U.S. -- just around the time Americans really start to tune in to the presidential election. "Neither Clinton nor Biden can escape the Obama economy," says Larry Sabato, director of the University of Virginia Center for Politics. "They will either pick the fruits or bear the burden." http://money.cnn.com/2015/09/05/news/economy/china-us-econom...