China's tariffs on U.S. commodities? A huge impact. Especially on bilateral trade. But also on global U.S. exports of soybeans.
China's tariffs on U.S. manufactures? By comparison, a relative modest impact.
The Group of Twenty, an informal gathering of many of the world’s largest economies, is the premier global forum for discussing economic issues. But it faces challenges from U.S. protectionism and the growth of emerging powers.