The level of the Yuan (the Chinese currency) is not even remotely a cause of the economic problems that the US faces. Appreciating the Yuan (and devaluing the dollar), a program advocated by Tim Geithner, is silly policy. The US has a miniscule savings rate and as long that is the case, we will have a huge trade imbalance (almost by definition, since whatever investment activity occurs in the US must have the savings provided from some external source).
It is becoming a bedrock of American economic polical life to blame someone else for our own foolish policies. By blaming others, you never face up to reality.
The cold, hard truth is that Obama's policies have damaged the prospects for a US economic recovery. It is not clear that Obama cares one way or another. He seems focused on other matters. But, Americans care. We will eventually have an economic recovery with permanently higher levels of unemployment. This will be the Obama economic legacy -- economic stagnation and slow economic growth.
Hopefully, after November 2nd, we can begin to remove some of the roadblocks to economic growth that the Obama team has put in the way of the economy. Most of the country would like to return to the bad old days of prosperity, even if Obama prefers not to.