Who holds the power in potential U.S.-China trade war?

With trade negotiations between the U.S. and China now in high gear, President Trump has suggested he might delay the latest round of tariffs on Chinese goods, currently scheduled to take effect March 1. Paul Solman reports on the disadvantages China faces in these trade negotiations, what options the country may have to retaliate and why trade wars can be "very, very stupid" maneuvers.