U.S. President Donald Trump plans to issue an executive order allowing him to impose U.S. sanctions on anyone who violates a conventional arms embargo against Iran, three sources familiar with the matter said on Thursday. U.S. President Donald Trump speaks while hosting an event commemorating the repatriation of Native American remains and artifacts from Finland in the Oval Office of the White House in Washington, U.S., September 17, 2020. REUTERS/Kevin Lamarque The sources, who spoke on condition of anonymity, said the executive order was expected to be issued in the coming days and would allow the president to punish violators with secondary sanctions, depriving them of access to the U.S. market. Neither the White House nor the Iranian mission to the United Nations immediately responded to requests for comment. The proximate cause for the U.S. action is the impending expiry of a U.N. arms embargo […]