cairo sudan summon u.s. charge affaires sunday complain order president donald trump temporarily ban entry citizens unite state sudanese foreign ministry say statement decision send negative message come two weeks unite state announce would ease economic sanction sudan urge unite state reconsider decision trump friday put four-month hold allow refugees unite state temporarily bar travelers syria six muslim-majority countries include sudan say move would help protect americans terrorist attack sudan summon u.s. charge d'affaires trump immigration order