(Reuters) - 1/THIRD LAW OF TARIFFSChina's exports rebound has been quickly overshadowed by dire predictions of Trade War II between the world's two biggest economies. Markets are hoping Donald Trump's threats to penalise China for COVID-19 are pandering to Americans' fear of China during an election year. After all, neither side can afford to further knock business confidence at a time when the world faces the worst economic contraction on record. In response to U.S. talk of slapping on more..