Trump's Threat to Punish Iran Trade Could Cause Problems With China

Trump warned of "tremendous economic consequences" for any country buying Iranian oil. These so-called secondary sanctions punish not just Iran but its trading partners. That could mean a standoff with China, Iran's biggest customer, just weeks before China's leader Xi Jinping is expected to visit the US. Analyst Gregory Brew called targeting China "hard." Iran said it will talk but "would not confuse negotiations with surrender."