BY JOHN BUSSEY

The U.S. is taking the trade fight to the front door of Fortress China, a step that could hold more promise for companies than the endless debate over the value of the yuan.

Prodded by corporate chiefs across the country, U.S. trade officials have launched a coordinated attack on the core of America's commercial conflict with China: the heavily protected and subsidized Chinese state-owned enterprises that are pounding U.S. companies not just in China but in competition globally.

"There's been a change" in the U.S. approach to Chinese state capitalism, says Christian Murck, who heads the American Chamber of Commerce ...