Trump's erratic trade policies are already undermining a key driver of economic prosperity

REUTERS/Jonathan Ernst Many of the economists and investors who feared Donald Trump's harsh trade promises during the presidential campaign have takenumbrageat some of the administration's lack of follow-throughon the divisive issue. The president did abandon the long-negotiated Trans-Pacific Partnership agreement between 12 Pacific Rim nations, a move seen as deep blow to America’s global leadership, especially in Asia. But despite tough campaign rhetoric against China, Trump backed off a pro...