It would be "catastrophic" for the U.S. to shift positions and indicate it backs the proliferation of nuclear weapons, Deputy National Security Adviser Ben Rhodes tells reporters at briefing during the Nuclear Security Summit in Washington. Rhodes, responding to question about comments from GOP presidential frontrunner Donald Trump that Japan and South Korea should consider exiting U.S. nuclear umbrella and build their own arsenals, says that notion "flies in the face of decades of bipartisan na
Source: Bloomberg Politics