If Mr. Trump succeeds in appointing key members of the Federal Reserve, the Treasury yield curve could steepen from its highest level in four years, according to strategists at JPMorgan. The spread between US five-year and 30-year Treasury yields widened on Thursday after Mr. Trump chose Stephen Millan, chairperson of the Council of Economic Advisers, as a Fed governor. The appointment is subject to Senate approval. "Millan has long argued that the Trump administration's trade, immigration and e...