The largest holder of U.S. debt is getting frustrated over Washington's financial situation. So Vice President Joe Biden is heading to China on a mission of reassurance on Wednesday. But Puru Saxena, who's an investment adviser in Hong Kong, says Washington's troubles are too big for its Asian partner to stop worrying about.<br />RT on Twitter: http://twitter.com/RT_com <br />RT on Facebook: http://www.facebook.com/RTnews
